Easy Tutorial
For Competitive Exams

NEET Mock Test

13875.A rigid ball of mass m strikes a rigid wall at 60º and gets reflected without loss of speed as shown in the figure below. The value of impulse imparted by the wall in the ball will beBall hitting wall with impulse
$\dfrac{mV}{3}$
mV
2mV
$\dfrac{mV}{2}$
Explanation:
J = 2mV cos 60º = mV
13886.Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100 ºC, while the other one is at 0 ºC. If the two bodies are brought into contact, then assuming no heat loss, the final common temperature is
0 ºC
50 ºC
more than 50 ºC
less than 50 ºC but greater than 0 ºC
Explanation:
Body at 100°C temperature has greater heat capacity than body at 0°C so final temperature will be closer to 100°C. So, Tc > 50°C
13893.Three sound waves of equal amplitudes have frequencies (n – 1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be
2
1
4
3
Explanation:
no. of beats = 1
(HCF of beat frequencies)
13898.A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be
2n2B
nB
n2B
2nB
Explanation:
circular loop diagram

$B = \dfrac{\mu_0i}{2R} = \dfrac{\mu_0i(2\pi)}{2l} = \dfrac{\mu_0\pi i}{2l}$

circular coil diagram

$B = \dfrac{\mu_0ni}{2r} = \dfrac{\mu_0ni}{2\left(\dfrac{l}{2n\pi}\right)} = \dfrac{n^2\mu_0\pi i}{2l} = n^2B$

13901.Which of the following combinations should be selected for better tuning of an L–C–R circuit used for communication?
R = 25 Ω, L = 1.5 H, C = 45 μF
R = 20 Ω, L = 1.5 H, C = 35 μF
R = 25 Ω, L = 2.5 H, C = 45 μF
R = 15 Ω, L = 3.5 H, C = 30 μF
Explanation:

Option with highest quality factor sould be chosen as most appropriate answer.

$Q = \dfrac{1}{R}\sqrt{\dfrac{L}{C}}$

13951.During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is
330 minutes
55 minutes
110 minutes
220 minutes
Explanation:

At Cathode:

NACl electrolysis cathode reaction

At anode:

NACl electrolysis anode reaction

$\dfrac{W}{E} = \dfrac{It}{96500}$

0.1 × 2 = $\dfrac{3 × t(sec)}{96500}$

t = 6433 sec

t = 107.2 min

∼ 110 min.

13953.For a sample of perfect gas when its pressure is changed isothermally from pi to pf, the entropy change is given by
$\triangle S = RT \ln \left(\dfrac{p_{i}}{p_{f}}\right)$
$\triangle S = nR \ln \left(\dfrac{p_{f}}{p_{i}}\right)$
$\triangle S = nR \ln \left(\dfrac{p_{i}}{p_{f}}\right)$
$\triangle S = nRT \ln \left(\dfrac{p_{f}}{p_{i}}\right)$
Explanation:

$\triangle S_{sys} = nR \ ln\dfrac{P_1}{P_2} \ + \ nCP\ ln\dfrac{T_2}{T_1}$

In isothermal process T1 = T2

$\triangle S_{sys} = nR \ln\dfrac{P_i}{P_f}$

13955.The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5N+H) in a 0.10 M aqueous pyridine solution (Kb for C5H5N = 1.7 × 10–9) is
1.6 %
0.0060 %
0.013 %
0.77 %
Explanation:

C5H5N + H5O → C5H5N+H + OH

$α = \sqrt{\dfrac{K_b}{c}} = \sqrt{\dfrac{1.7 \times 10^{-9}}{0.1}} = \sqrt{1.7 \times 10^{-8}}$

% α = 1.3 × 10–4 ×100

= 1.3 × 10–2 = 0.013.

13979.Which one of the following structures represents nylon 6,6 polymer?
nylon 6,6 polymer structure option 1
 nylon 6,6 polymer structure option 2
 nylon 6,6 polymer structure option 3
nylon 6,6 polymer structure option 4
Explanation:

Nylon-6,6 → adipic acid + Hexamethylenediamine

nylon 6,6 polymer structure answer
15147.Phenetic classification of organisms is based on
Sexual characteristics
Dendrogram based on DNA characteristics
The ancestral lineage of existing organisms
Observable characteristics of existing organisms
15188.Chlorenchyma develops in
Mycelium of a green mold such as Aspergillus
Cytoplasm of Chlorella
Capsule of a moss
Pollen tube of Pinus
15220.Algae having oil as reserve food belongs to
Xanthophyceae
Rhodophyceae
Chlorophyceae
Phaeophyceae
15226.Cycas and Adiantum resemble each other in having:
Cambium
Vessels
Seeds
Motile Sperms
15237.The female reproductive structure of small, nonvascular plants that produces a single egg by mitosis is
Archegonium
Antheridium
Gemmae cup
Sporangiophore
15240.The sporophytes are heterosporous in
Selaginella
Nephrolepis
Marchantia
Polytrichum
15362.Which organism possesses characteristics of plants and animals?
Bacteria
Monera
Euglena
Mycoplasma
15377.Air bladder is present in
Chondrichthyes
Star fishes
Actinopterygii
Flying fishes
15388.Cold-blooded animals fall into which category?
Ectotherms
Psychrotherms
Endotherms
Thermophiles
15471.Study the following columns and select the most appropriate matching from the options below.
Column IColumn II
A. Pasteurella pestisI. Angular leaf spot of cotton
B. Treponema pallidumII. Amphotericin
C. Mycobacterium bovisIII. Actinomycosis of cattle
D. Streptomyces nodosusIV. Syphilis
V. Plague
A - IV, B - I, C - II, D - III
A - II, B - III, C - IV, D - V
A - V, B - IV, C - III, D - II
A - III, B - II, C - I, D - IV
15474.The ovary is half inferior in flowers of
Guava
Peach
Cucumber
Cotton
15558.The monocotyledonous seed consists of one large and shield shaped cotyledon known as
Coleoptile
Scutellum
Aleurone layer
Coleorhiza
15582.Companion cells are closely associated with
Trichomes
Guard cells
Sieve elements
Vessel elements
15611.Myoglobin is found in______.
White fibre
Red fibre
Yellow fibre
All of them
15671.Schwann cell is found around______.
Axon
Cyton
Dendrite
Dendron
15751.Smaller cell is
less active metabolically
with larger nucleus
with smaller nucleus
more active metabolically
15782.Assertion: A cell membrane shows fluid behaviour.
Reason: A membrane is a mosaic or composite of diverse lipids and proteins.
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
Assertion is true statement but Reason is false.
Both Assertion and Reason are false statements.
15868.The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme green gram-phosphatase. What does the graph indicate?
The rate of enzyme reaction is directly proportional to the substrate concentration
Presence of an enzyme inhibitor in the reaction mixture
Formation of an enzyme-substrate complex
At higher substrate concentration the pH increases
15911.In soil, water available for plants is
Capillary water
Hygroscopic water
Gravitational water
Chemically bound water
15924.Water is lost in a liquid state in some plants through hydathodes. These hydathodes
do not show any specificity in opening and closing
remain closed during day
remain closed at night
remain always open
15935.A trace element is an element Which of the statements given above is/are correct?
is a radio active and can be traced by Geiger counter
is required in very minute amounts
draw other element out of protoplasm
was one of the first to be discovered in protoplasm
16043.Which of the following is a 4-carbon compound?
Oxaloacetic acid
Phosphoglyceric acid
Ribulose biphosphate
Phosphoenolpyruvate
16119.Which of the following gas would disappear from the atmosphere if all the photosynthetic activities were to stop?
Nitrogen
Carbondioxide
Hydrogen
Oxygen
16181.Sugar moves in phloem vessels as ______.
cellulose
glucose
starch
sucrose
Explanation:
Glucose is called principle carbohydrate, sucrose is called translocable carbohydrate, starch is called storage carbohydrate and cellulose is called structural carbohydrate.
16285.The rate of photosynthesis is maximum in
Blue light
Red light
Green light
Violet light
16359.Epigeal germination is found in
Gram
Pea
Castor
Jowar
16375.The only gaseous harmone in plants is
Auxin
GA
ABA
Ethylene
16395.Cell membrane is ________.
permeable
impermeable
semipermeable
selectively permeable
16404.When a cell is fully turgid, which one of the following is zero?
Turgor pressure
Wall pressure
Diffusion pressure deficit
Osmotic pressure
16458.The rapid type of water absorption is
Active absorption
Passive absorption
Active osmotic absorption
Active non-osmotic absorption
16464.Cohesion – transpiration pull theory operates only in
Active water absorption
Passive water absorption
Conditions opposing transpiration
Conditions favouring transpiration
16574.Which of the following is un-matching pair?
Kidney - nephron
Liver - hepatocytes
Pancreas - Glisson's capsule
Stomach - cardiac glands
16580.Sweetest sugar is
Fructose
Sucrose
Glucose
Lactose
16605.Keratinization of the skin is prevented by
Vitamin D
Vitamin A
Vitamin B
Vitamin C
16625.Which vitamin can be synthesized by bacteria inside gut?
Vitamin B1
Vitamin C
Vitamin K
Vitamin D
16633.Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?
Stomach:Fats $\xrightarrow{\text{Lipase}}$ micelles
Duodenum:Triglycerides $\xrightarrow{\text{trypsin}}$ monoglycerides
Small intestine:starch $\xrightarrow{\text{(α)amylase}}$ Disaccharide (Maltose)
Small intestine:proteins $\xrightarrow{\text{pepsin}}$ amino acids
16817.Mitochondria are self replication organelles as they have
Thylakoids
Oxysomes
Ribosomes
DNA
16829.In presence of cyanide, azide and carbon monoxide, the rate of respiration
Decreases
Increases
Remains the same
None of the above
16884._____ Kcal energy is conserved as 38 ATP molecules in cellular respiration of one glucose molecule
277 Kcal
654 Kcal
456 Kcal
686 Kcal
16901.Before entering Krebs cycle pyruvate is changed to
Oxaloacetate
PEP
Pyruvate
Acetyl CoA
16977.Fructose 6 – phosphate is changed to fructose 1, 6-diphosphate by
Phosphoglycerate
Phosphatase
Phosphofructo – kinase
Enolase
17003.Krebs cycle begins with
Pyruvic acid
Hydrochloric acid
Corticosteroids
Lysine
17059.Respiration is an
Endothermic process
Exothermic process
Anabolic process
Endegonic process
17078.An adult human has systolic and diastolic pressures as:
80 mm Hg and 120 mm Hg
120 mm Hg and 80 mm Hg
50 mm Hg and 80 mm Hg
80 mm Hg and 80 mm Hg
17086.Artificial pace maker is transplanted in
Inter auricular septum
Below the collar bone
Inter ventricular septum
Right auricle
17092.Both erythrocytes and leucocytes are formed in
Lymph nodes
Bone marrow
Thymus
Arterial walls
17147.The vein that does not directly open into the heart is :
Pulmonary vein
Postcaval vein
Precaval vein
Posterior mesenteric vein
17164.Which of the following matches correctly?
Pulmonary artery - Carries deoxygenated blood to the lungs
Superior vena cava - Receives deoxygenated blood from the lower body and organs
Inferior vena cava - Receives deoxygenated blood from the head and body
Hepatic artery - Carries deoxygenated blood to the gut
17171.A portion of cardiovascular system that transports oxygen depleted blood from the heart to lungs and brings oxygenated blood back to heart is
Pulmonary circulation
Coronary circulation
Systemic circulation
Single circulation system
17244.Pulmonary trunk and aorta are attached by
Chordae tendinae
Ligamentum arteriosus
Coronary sulcus
Pericardium
17245.Pulmonary vein carries blood
Deoxygenated
Oxygenated
Mixed
Free from wastes
17327.Which one of the following items gives its correct total number?
Cervical vertebrae in humans - 8
Floating ribs in humans - 4
Amino acids found in proteins - 16
Types of diabetes - 3
17339.Which joint occurs between humerus and radioulna?
Ball and socket joint
Sliding
Pivot
Hinge joint
17350.When bone becomes hard, the osteocytes are trapped in hollow chambers called
Osteoblasts and osteoclasts
Red bone marrow
Cartilage
Lacunae
17353.Which molecule provides ATP during muscle contraction?
Creatine phosphate
Hemoglobin
Myoglobin
Myosin
17380.Joint between bones of human skull is
Hinge joint
Cartilaginous joint
Synovial joint
Fibrous joint
17399.ATPase enzyme essential for muscle contraction is found in
Actinin
Myosin
Troponin
Actin
17501.Hormone responsible for the secretion of milk after parturition
ICSH
Prolactin
ACTH
LH
17528.Which of the following hormones synchronizes circadian rhythms and may be involved in onset of puberty?
Thymopoietin
Thymosin
Melatonin
Parathyroid
17600.The tenuinucellate ovule has
Small amount of nucellus
Large amount of nucellus
Chalazal nucellus
Micropyle nucellus
17614.Grafting is successful in dicots but not in monocots because the dicots have:
cork cambium
vessels with elements arranged end to end
vascular bundles arranged in a ring
cambium for secondary growth
17649.The type of seed in which endosperm is completely utilized by developing embryo
Endospermic seed
Non endospermic sees
Albuminous seed
None of these
17664.Buds develops in Bryophyllum daigremonthianum
From marginal notches when leaf falls on ground
From marginal notches while attached to plant
From marginal notches of leaves
From the place of injury
17746.Where do the female gonads (paired ovaries) lie?
Pelvic cavity
Thoracic cavity
Abdominal cavity
Scrotal sacs
17824.Number of eggs released in the life time of a woman is approximately
40
400
4000
20000
18016.A self-fertilizing trihybrid plant forms:
8 different gametes and 32 different zygotes
8 different gametes and 16 different zygotes
8 different gametes and 64 different zygotes
4 different gametes and 16 different zygotes
18041.The primary control of gene expression takes place at the level of
Translation
Transcription
DNA-replication
None of the above
18048.Removal of RNA polymerase III from nucleoplasm will affect the synthesis of
mRNA
rRNA
tRNA
hnRNA
18073.The sequence of structural gene in lac operon concept is
lac Y, lac Z, lac A
lac Z, lac Y, lac A
lac A, lac Y, lac Z
lac A, lac Z, lac Y
18092.All the terminator codons begin with the nucleotide of
Adenine
Uracil
Guanine
Cytosine
18182.AIDS day
May 1
December 20
June 1
December 1
18367.Elephantiasis is caused by
Dracunculus medinensis
Entrobius vermicularis
Wuchereria bancrofti
None of the above
18572.Major glycoside present in leaf juice of Aloe vera is
Emodin
Aloe emodin
Barbaloin
Aloin
18703.Agarose extracted from sea weeds finds use in
Gel electrophoresis
Spectrophotometry
Tissue culture
PCR
18749.Which part would be most suitable for raising virus-free plants for micropropagation?
Meristem
Node
Bark
Vascular tissue
18789.Bacillus thuringiensis is used to control
Nematodes
Fungal pathogens
Bacterial pathogens
Insect pests
18834.A flowering plant lily have ______ more DNA than humans
10 times
15 times
18 times
13 times
18863.Base pairs present in one turn of DNA are
12
11
10
9
18923.Reverse transcriptase is
RNA dependent RNA polymerase
DNA dependent RNA polymerase
DNA dependent DNA polymerase
RNA dependent DNA polymerase
18975.Select the correct statement
Morphine is often given to a person who has undergone surgery as a pain killer
Chewing tobacco lowers blood pressure and heart rate
Cocaine is given to patients after surgery as it stimulates recovery
Barbiturates when given to criminals make them tell the truth
18980.Ergot of fungus produces
Charas
LSD
Marijuana
Barbiturates
18983.Density of a population 4. is
D = S(size) / W(weight)
D = S(space) / N(number)
D = N(number) / S(space)
None of the above
19014.Smoking hubble-bubble may spread
Pulmonary tuberculosis
Kwashiorkar
Goitre
Rickets
19133.An exhaustible renewable resource is
Coal
Solar energy
Fresh water
Petroleum
19150.A plant endemic to India is
Banyana
Ginkgo
Sequoia
Triticum
19173.Most effective in controlling floods is
Deforstation
Constructing dams
Reforestation
Digging canals
19182.Which one of the following in endangered species?
Cuscuta
Nepenthes
Datura
Butea sps.
19233.Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by
The Vienna Convention
Rio de Janeiro Conference
The Montreal Protocol
The Koyoto Protocol
19280.Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?
CO2 40%,CFCs 30%
CFCs 14%, Methane 20%
Methane 20%, N2O 18%
N2O 6%, CO2 86%
21227.The maximum number of electrons that can have principal quantum number, n = 3, and spin quantum number, ms = $-\dfrac{1}{2}$, is
5
7
9
11
21242.How many 'd' electrons are present in Cr2+ ion?
4
5
6
3
21253.With increase in principal quantum number n, the energy difference between adjacent energy levels in hydrogen atom
increases
decreases
remain constant
decreases for lower values of n and increases for higher values of n
21270.The frequency of light emitted for the transition n = 4 to n = 2 of He+ is equal to the transition in H atom corresponding to which of the following?
n = 4 to n = 3
n = 3 to n = 1
n = 2 to n = 1
n = 3 to n = 2
21273.Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively:
12 and 4
12 and 5
16 and 4
16 and 5
21279.If the wavelength of an electromagnetic radiation is 2000Å, what is its energy in ergs?
9.94 × 10–12
9.94 × 10–10
4.97 × 10–12
4.97 × 10–19
21284.In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom.
+ 3.4 eV
+ 6.8 eV
– 13.6 eV
+ 13.6 eV
21331.During the formation of a chemical bond
energy decreases
energy increases
energy of the system does not change
electron-electron repulsion becomes more than the nucleus-electron attraction
21360.Which of the following is paramagnetic?
CO
O
2
CN
NO+
21365.The percentage of p-character in the orbitals forming P-P bonds in P4 is
25
33
50
75
21380.Which one of the following is paramagnetic?
N2
NO
CO
O3
21401.For one mole of an ideal gas the slope of V vs. T curve at constant pressure of 2 atm is X lit mol–1 K–1. The value of the ideal universal gas constant ‘R’ in terms of X is
X lit atm mol–1K–1
X/2 lit atm mol–1K–1
2X lit atm mol–1K–1
2X atm lit–1mol–1K–1
21410.4 grams of an ideal gas occupies 5.6035 liters of volume at 546 K and 2 atm pressure. What is its molecular weight?
4
16
32
64
21420.At 27°C a closed vessel contains equal weight of He, CH4 and SO2 exerts a pressure of 210 mm and partial pressures of He, CH4 and SO2 are P1, P2 and P3. Which one of the following is correct?
P3 > P2 > P1
P1 > P2 > P3
P1 > P3 > P2
P2 > P3 > P1
21489.The value of ΔH for cooling 2 mole of an ideal monoatomic gas from 225°C to 125°C at constant pressure will be (given Cp = 5/2 R)
250 R
–500 R
500 R
–250 R
21568.The equilibrium constants $\text{K}_{P_{1}}$ and $\text{K}_{P_{1}}$ for the reactions

X ⇌ 2Y and Z ⇌ P + Q

respectively are in the ratio of 1 : 9. If the degree of dissociation of X and Z be equal then the ratio of total pressure at these equilibria is

1 : 36
1 : 1
1 : 3
1 : 9
21573.For the reaction 2HI(g) ⇌ H2(g) + I2(g) – QKJ, the equilibrium constant depends upon
temperature
pressure
catalyst
volume
21651.Extra pure N2 can be obtained by heating
NH3 with CuO
NH4NO3
(NH4)2Cr2O7
Ba(N3)2
21736.A compound contains two types of atoms X and Y. It crystallizes in a cubic lattice with atoms X at the corners of the unit cell and atoms Y at the body centre. The simplest possible formula of this compound is:
X8Y
X2Y
XY
XY8
21752.AB is an ionic solid. If the ratio of ionic radii of A+and B is 0.52. What is the coordination number of B?
6
3
2
8
21759.In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is
A2B5
A2B
AB2
A2B3
21767.Silver (atomic weight = 108 g mol–1) has a density of 10.5 g cm–3. The number of silver atoms on a surface of area 10–12 m2 can be expressed in scientific notation as y × 10$x$. The value of $x$ is
13
9
7
5
21822.The Henry's law constant for the solubility of N2 gas in water at 298 K is 1.0 × 105 atm. The mole fraction of N2 in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298 K and 5 atm pressure is
4.0 × 10–4
4.0 × 10–5
5.0 × 10–4
4.0 × 10–6
21841.Volume of water needed to mix with 10 mL N HCl to get 0.1 N HCl is
90 mL
9 mL
900 mL
1000 mL
21870.One gram of silver gets distributed between 10 cm3 of molten zinc and 100 cm3 of molten lead at 800°C. The percentage of silver still left in the lead layer is approximately
5
2
1
3
22306.Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M aqueous solution, lactic acid is 3.7% dissociates. The value of dissociation constant, Ka, for this acid will be:
2.8 × 10–4
1.4 × 10–5
1.4 × 10–4
3.7 × 10–4
22384.The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2 = 0.301)
230.3 minutes
23.03 minutes
46.06 minutes
460.6 minutes
22426.Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005 respectively. The correct order of their protective powers is
B < D < A < C
D < A < C < B
C < B < D < A
A < C < B < D
22495.Which one of the following molecules is expected to exhibit diamagnetic behaviour?
C2
N2
O2
S2
22505.Which do not decolourise KMnO4 aqueous solution?
C2O
4
HSO
3
CO2–
3
SO2–
3
22564.Which of the following compounds shows optical isomerism?
[Cu(NH3)4]2+
[ZnCl4]2–
[Cr(C2O4)3]3–
[Co(CN)6]3–
22579.The absolute configuration of
absolute configuration of compoundis
(2S, 3R)
(2S, 3S)
(2R, 3R)
(2R, 3S)
22623.Methyl phenyl ether can be obtained by reacting
phenolate ions and methyl iodide
methoxide ions and bromobenzene
methanol and phenol
bromobenzene and methyl bromide
22723.Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?
Methyl isocyanide
Acetamide
Methyl cyanide
Nitroethane
22746.Which of the following amino acids is basic in nature?
Valine
Tyrosine
Arginine
Leucine
22747.One mole of stachyose on hydrolysis yields
1 mole of glucose + 1 mole of fructose + 2 mole of galactose
2 mole of glucose + 1 mole of fructose + 1 mole of galactose
1 mole of glucose + 2 mole of fructose + 1 mole of galactose
2 mole of glucose + 2 mole of fructose
22786.Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms presence of
six carbon atoms linked in straight chain
secondary alcoholic group in glucose
aldehyde group in glucose
primary alcoholic group in glucose
22797.Which is not polymer?
Sucrose
Enzyme
Starch
Teflon
22854.Three dimensional molecules with cross links are formed in the case of a _____.
Thermoplastic
Thermosetting plastic
Both A and B
None of these
22899.Which of the following is an anionic detergent?
Sodium lauryl sulphate
Cetyltrimethyl ammonium bromide
Glyceryl oleate
Sodium stearate
22921.Which of the following compounds is not an antacid?
Aluminium Hydroxide
Cimetidine
Phenelzine
Ranitidine
23259.A physical quantity Q is found to depend on observables x, y and z, obeying relation $Q = \dfrac{x^3y^2}{z}$. The percentage error in the measurements of x, y and z are 1%, 2% and 4% respectively. What is percentage error in the quantity Q?
4%
3%
11%
1%
23316.A particle is moving along a circular path. Let $v$, ω, α and ac be its linear velocity, angular velocity, angular acceleration and centripetal acceleration respectively. Which is the wrong statement from the following?
$\overrightarrow{\omega} \perp \overrightarrow{v}$
$\overrightarrow{\omega} \perp \overrightarrow{a}_c$
$\overrightarrow{\omega} \perp \overrightarrow{\alpha}$
$\overrightarrow{v} \perp \overrightarrow{a}_c$
23320.A particle moving in a circle of radius 25 cm at 2 revolutions per second. The acceleration of the particle is S.I. unit is
4$π$2
3$π$2
2$π$2
$π$2
23327.A motor cyclist moving with a velocity of 75 km/hr on a flat road takes a turn on the road at a point where the radius of curvature of the road is 20 m. If the g is 10 m/s2 the maximum angle of banking with vertical for no skidding is
tan1 (6)
tan1 (2)
tan1 (12)
tan1 (4)
23356.The maximum safe speed for a vehicle taking a turn on a curved banked road, does not depend upon
acceleration due to gravity
mass of the vehicle
angle of inclination (θ) with the horizontal
radius of curvature of the track
23382.A machine gun fires a bullet of mass 40 g with a velocity 1200 ms–1. The man holding it can exert a maximum force of 144 N on the gun. How many bullets can he fire per second at the most?
One
Two
Three
Four
23384.The force F acting on a particle of mass m is indicated by the force–time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is force–time graph of a particle
24 Ns
20 Ns
12 Ns
6 Ns
23410.A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is
$\sqrt{\dfrac{mk}{2}} t^{–\dfrac{1}{2}}$
$\sqrt{mk} t^{–\dfrac{1}{2}}$
$\sqrt{2mk} t^{–\dfrac{1}{2}}$
$\dfrac{1}{2}\sqrt{mk} t^{–\dfrac{1}{2}}$
23421.Statement–1 : When ultraviolet light is incident on a photocell, its stopping potential is V0 and the maximum kinetic energy of the photoelectrons is Kmax. When the ultraviolet light is replaced by X–rays, both V0 and Kmax increase.
Statement–2 : Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.
Statement–1 is true, Statement–2 is false
Statement–1 is false, Statement–2 is true
Statement–1 is true, Statement–2 is true; Statement–2 is the correct explanation of Statement–1
Statement–1 is true, Statement–2 is true; Statement–2 is the not the correct explanation of Statement–1
23423.According to Einstein s photoelectric equation, the plot of the kinetic energy of the emitted photoelectrons from a metal Vs the frequency, of the incident radiation gives a straight line whose slope:
depends on the nature of the metal used
depends on the intensity of the radiation
depends both on the intensity of the radiation and the metal used
is the same for all metals and independent of the intensity of the radiation
23427.If the momentum of an electron is changed by P, then the de Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be
200 P
400 P
P/200
100 P
23429.A certain metallic surface is illuminated with monochromatic light of wavelength λ. The stopping potential for photo–electric current for this light is 3V0. If the same surface is illuminated with light of wavelength 2λ, the stopping potential is V0. The threshold wavelength for this surface for photoelectric effect is
λ/4
λ/6
23461.A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance, R, connected across the given cell, has values of
(i) Infinity
(ii) 9.5 Ω,
the balancing lengths on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is
0.25 Ω
0.95 Ω
0.5 Ω
0.75 Ω
23468.Three resistances 2 Ω, 3 Ω and 4 Ω are connected in parallel. The ratio of currents passing through them when a potential difference is applied across its ends will be
5 : 4 : 3
6 : 3 : 2
4 : 3 : 2
6 : 4 : 3
23484.The Kirchhoff’s first law (Σi = 0) and second law (ΣiR = ΣE), where the symbols have their usual meanings, are respectively based on
conservation of charge, conservation of energy
conservation of charge, conservation of momentum
conservation of energy, conservation of charge
conservation of momentum, conservation of charge
23488.When 5 V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is 2.5 × 10–4 ms–1. If the electron density in the wire is 8 × 1028 m–3, the resistivity of the material is close to
1.6 × 10–8 Ωm
1.6 × 10–7 Ωm
1.6 × 10–6 Ωm
1.6 × 10–5 Ωm
23491.A 5V battery with internal resistance 2 Ω and a 2V battery with internal resistance 1 Ω are connected to a 10 Ω resistor as shown in the figure.
5V battery with internal resistance
The current in the 10 Ω resistor is
0.03 A P1 to P2
0.03 A P2 to P1
0.27 A P1 to P2
0.27 A P2 to P1
23512.A charged particle moves through a magnetic field perpendicular to its direction. Then
the momentum changes but the kinetic energy is constant
both momentum and kinetic energy of the particle are not constant
both momentum and kinetic energy of the particle are constant
kinetic energy changes but the momentum is constant
23525.The magnetic lines of force inside a bar magnet
are from north–pole to south–pole of the magnet.
do not exist.
depend upon the area of cross–section of the bar magnet.
are from south–pole to north–pole of the magnet.
23529.A magnetic needle is kept in a non–uniform magnetic field. It experiences
a torque but not a force
neither a force nor a torque
a force and a torque
a force but not a torque
23533.If an electron and a proton having same momenta enter perpendicularly to a magnetic field, then
curved path of electron and proton will be same (ignoring the sense of revolution)
they will move undeflected
curved path of electron is more curved than that of the proton
path of proton is more curved
26082.Which one of the following cell organelles is enclosed by a single membrane?
Nuclei
Mitochondria
Chloroplasts
Lysosomes
Explanation:

Lysosomes is enclosed by a single membrane while Mitochondria, Chloroplasts and Nuclei are enclosed by double membrane.
26125.A unit mass of solid converted to liquid at its melting point. Heat is required for this process is
Specific heat
Latent heat of vaporization
Latent heat of fusion
External latent heat
26129.The specific heat of a gas in isothermal process is
Zero
Negative
Remains constant
Infinite
26154.The root mean square speed of hydrogen molecules at 300K is 1930 m/s. then the root mean square speed of oxygen molecule at 900K will be
1930$\sqrt{3}$ m/s
838 m/s
643 m/s
$\dfrac{1930}{\sqrt{3}}$ m/s
26180.The r.m.s velocity of oxygen molecules at 27°C is 318 m/s. the r.m.s velocity of hydrogen molecules at 127°C is
1470 m/s
1603 m/s
1869 m/s
2240 m/s
26195.Translational kinetic energy of gas molecule, for one mole of the gas, is equal to
$\dfrac{3}{2}RT$
$\dfrac{2}{3}KT$
$\dfrac{1}{2}RT$
$\dfrac{2}{1}KT$
26200.Which of the following is the unit of specific heat?
J kg/°C
J/kg°C
kg °C/J
J kg/°C2
26209.The distance of Neptune and Saturn from the sun are nearly 1013 m and 1012 m respectively. Assuming that they move in circular orbits, their periodic times would be in the ratio of
10
100
10 $\sqrt{10}$
1000
26212.If the earth is 1/4th of its present distance from the sun, the duration of the year would be
1/4 of the present year
1/6 of the present year
1/8 of the present year
1/16 of the present year
26227.Who among the following first gave the experimental velocity of G?
Cavendish
Copernicus
Brook Taylor
none of these
26240.The escape velocity from earth is 11.2 km per sec. If a body is to be projected in a direction making an angle 45° to the vertical, then the escape velocity is
11.2 × 2 km/sec
11.2 km/sec
11.2 ×$\dfrac{1}{\sqrt{2}}$ km/sec
11.2 ×${\sqrt{2}}$ km/sec
26249.If the change in the value of g at the height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)
x = h
x = 2 h
x = $\dfrac{h}{2}$
x = h2
26254.Heat energy received by the earth from the sun is due to
Convection
Radiation
Reflection of light
Transmission of light
26274.Co-efficient of reflection, coefficient of absorption and coefficient transmission are related as
a + r + 1 = 1
a + r + t = 1
a + r = -t
a ≠ r + 1
26279.A body cools from 50°C to 46°C in 5 minutes and to 40°C in the next 10 minutes. The surrounding temperature is
30°C
28°C
36°C
32°C
26298.Three black bodies A, B and C in the form of cubes of sides in the ratio of 3: 4: 5 are kept at the same high temperature. The ratio of the quantity of heat lost per second by A, B and C will be
27: 64: 125
5: 4: 3
9: 16: 25
25: 16: 9
26326.Radiation emitted by a surface is directly proportional to
Third power of its temperature
Equal to its temperature
Twice power of its temperature
Fourth power of its temperature
26332.A sphere cube and a thin circular plate all made of the same material and having the same mass are initially heated to a temperature of 300°C. which of these cools fastest?
Sphere
Cube
Plate
None of these
26335.The temperature of a piece of metal is raised from 27°C to 51.2°C. the rate at which metal radiates energy increases nearly
1.36 times
2.36 times
3.36 times
4.36 times
26338.A body cools from 100°C to 70°C in 8 minutes. If the room temperature is 15°C and assuming Newton’s law of cooling holds good, then time required for the body to cool from 70°C to 40°C is
14 s
10 s
8 s
5 s
Share with Friends