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NEET - Chemistry p-Block Elements Practice Q & A Page: 2
21605.Which one of the following arrangement does not give the correct picture of the trends indicated against it?
F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
F2 > Cl2 > Br2 > I2 : Bond dissociation energy
F2 > Cl2 > Br2 > I2 : Electronegativity
F2 > Cl2 > Br2 > I2 : Oxidizing power
21606.The angular shape of ozone molecules (O3) consists of
2 sigma and 1 pi bonds
1 sigma and 2 pi bonds
2 sigma and 2 pi bonds
1 sigma and 2 pi bonds
21607.The function of Fe(OH)3 in the contact process is
to detect colloidal impurity
to remove moisture
to remove dust particles
to remove arsenic impurity
21608.The inert gas abundantly found in atmosphere is
Ar
Ne
Xe
He
21609.Helium is used in balloons in place of hydrogen because it is
incombustible
more abundant than hydrogen
radioactive
lighter than hydrogen
21610.When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from
Zero to –1 and zero to +3
Zero to +1 and zero to –3
Zero to +1 and zero to –5
Zero to –1 and zero to +5
21611.Which one of the following orders correctly represents the increasing acid strengths of the given acids?
HOClO2 < HOClO3 < HOClO < HOCl
HOClO < HOCl < HOClO3 < HOClO2
HOClO3 < HOClO2 < HOClO < HOCl
HOCl < HOClO < HOClO2 < HOClO3
21612.Which one of the following is an amphoteric oxide?
ZnO
Na2O
SO2
B2O3
21613.Which is most easily liquefiable rare gas?
Xe
Ne
Ar
Kr
21614.The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is
zero
two
one
three
21615.Which of the following reactions of xenon compounds is not feasible?
XeO3 + 6HF → XeF6 + 3H2O
3XeF4 + 6H2O → 2Xe + XeO3 + 12HF + 1.5O2
2XeF2 + 2H2O → 2Xe + 4HF + O2
XeF6 + RbF → Rb [XeF7]
21616.The percentage of p–character in the orbitals forming P – P bonds in P4 is
25
33
50
75
21617.Which is the strongest acid in the following?
HClO3
HClO4
H2SO3
H2SO4
21618.Which of the following is not oxidized by O3?
KI
FeSO4
KMnO4
K2MnO4
21619.Which of the following does not give oxygen on heating?
Zn(ClO3)2
K2Cr2O7
(NH4)2Cr2O7
KClO3
21620.XeF2 is isostructural with
ICl–
2
SbCl3
BaCl2
TeF2
21621.Which of the following statements is true?
H3PO3 is a stronger acid than H2SO3
In aqueous medium HF is a stronger acid than HCl
HClO4 is a weaker acid than HClO3
HNO3 is a stronger acid than HNO2
21622.Which blue liquid is obtained on reacting equimolar amounts of two gases at –30°C?
N2O
N2O3
N2O4
N2O5
21623.The decreasing values of bond angles from NH3 (106°) to SbH3 (101°) down group–15 of the periodic table is due to
increasing bp–bp repulsion
increasing p–orbital character in sp3
decreasing lp–bp repulsion
decreasing electronegativity
21624.Which of the following molecules has trigonal planner geometry
NH3
BF3
PCl3
IF3
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