22640.Name the catalyst used in commercial method of preparation of phenol.
Silica
Calcium phosphate
Anhydrous aluminium chloride
Cobalt naphthenate
22641.In Williamson's synthesis
an alcohol is heated with conc. H2SO4 at 140°C
an alkyl halide is treated with sodium
an alkyl halide is treated with sodium alkoxide
None of the above
22642.When compound X is oxidised by acidified potassium dichromate, compound Y is formed. Compound Y on reduction with LiAlH4 gives X. (X) and (Y) respectively are
C2H5OH, CH3COOH
CH3COCH3, CH3COOH
C2H5OH, CH3COCH3
CH3CHO, CH3COCH
22643.In preparation of alkene from alcohol using Al2O3 which is effective factor:
Porosity of Al2O3
Temperature
Concentration
Surface area ofAl2O3
22644.The correct order of decreasing acidity of nitrophenols will be
m–Nitrophenol > p–Nitrophenol > o–Nitrophenol
o–Nitrophenol > m–Nitrophenol > p–Nitrophenol
p–Nitrophenol > m–Nitrophenol > o–Nitrophenol
p–Nitrophenol > o–Nitrophenol > m–Nitrophenol
22645.When phenol is treated with CHCl3 and NaOH, the product formed is:
Salicylic acid
Salicylaldehyde
Benzaldehyde
Benzoic acid
22646.The enzymes which are used to convert starch into ethyl alcohol are
maltase, diastase
diastase, maltase, zymase
invertase, zymase
invertase, diastase, maltase
22647.Which of the following compounds when heated with CO at 150°C and 500 atm pressure in presence of BF3 forms ethyl propionate?
C2H5OH
CH3OCH3
C2H5OC2H5
CH3OC2H5
22648.When Phenyl Magnesium Bromide reacts with tert.butanol, which of the following is formed?
Tert. butyl methyl ether
Benzene
Tert. butyl benzene
Phenol
22649.Which of the followings is correct?
Acetophenone is an ether
Diastase is an enzyme
Cycloheptane is an aromatic compound
All the above
22650.Which of the following is Lucas reagent?
ZnCl2/conc. HCl
Br2/CCl4
Ammoniacal silver nitrate
Cold Alkaline KMnO4
22652.Which of the following reagents may be used to distinguish between phenol and benzoic acid?
Neutral FeCl3
Aqueous NaOH
Tollen's reagent
Molisch reagent
22653.Which one of the following compounds converts methyl magnesium Iodide to methane in one step?
C2H4
C2H5Cl
C2H5OC2H5
C2H5OH
22654.Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?
CH3CH2CH(OH)CH3
CH3OH
CH3CH2OH
CH3CH(OH)CH3
22655.Arrange the following compounds in the increasing order of their acidic strength:
i. m–nitrophenol
ii. m–cresol
iii. phenol
iv. m–chlorophenol
i. m–nitrophenol
ii. m–cresol
iii. phenol
iv. m–chlorophenol
iii < ii < i < iv
ii < iv < iii < i
ii < iii < iv < i
ii < iii < i < iv
22656.Among the following sets of reactants which one produces anisole?
CH3CHO; RMgX
C6H5OH; NaOH; CH3I
C6H5OH; neutral FeCl3
C6H5–CH3; CH3COCl; AlCl3
22657.Select the ether among following that yields methanol as one of the products on reaction with cold hydroiodic acid
1–Methoxybutane
1–Methoxy–2–methylpropane
2–Methoxy–2–methylpropane
Methoxybenzene
22658.Iodoform can be prepared from all except:
Ethyl methyl ketone
Isopropyl alcohol
3–Methyl–2–butanone
Isobutyl alcohol
22659.Two aromatic compounds having formula C7H8O which are easily identifiable by FeCl3 solution test (violet colouration) are
o–cresol and benzyl alcohol
m–cresol and p–cresol
o–cresol and p–cresol
methyl phenyl ether and benzyl alcohol