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Unit C 4 5 Chemistry Teacher Essay

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Q.1 Picric acid is prepared by the reaction of the phenol with A) Dil HNO3 C) Very Dilute HNO3
B) Conc. HNO3 D) Conc. H2SO4
Q.2 Aldehyde group can occur
A) Anywhere in carbon chain C) In the middle of the carbon chain B) Only at second carbon of the chain D) Only at the end of carbon chain Q.3 Ethanol can react with all except
B) Na2CO3 D) Alkaline aqueous iodine
Q.4 Identify the final product Z in the following sequence of reactions (CH3)2CO + HCN X Y--------sulphuric acid Z
Q.5 The steps in the mechanism of addition of 2,4-DNPH to carbonyl compounds are given below I. Attack of 2,4-DNPH II. Protonation of carbonyl group
III. Removal of water IV. Proton transfer
Pick out the correct sequence of steps for this mechanism
A) I > II > III > IV C) IV > III > II > I
B) II > I > IV > III D) I > III > IV > II
Q.6 Hydrogen bonding is maximum in
A) Ethanol C) Ethyl chloride
B) Phenol D) Trimethyl amine
Q.7 All aldehydes and ketones react with one of the followings in similar way A) Tollen’s reagent C) Acid dichromate
B) Fehling’s solution reagent D) Aqueous alkaline iodine reagent Q.8 One of the following will react with ethanol but not with acetaldehyde A) Acid dichromate C) NaOH/iodine
B) Sodium metal D) 2, 4-DNPH
Q.9 Aldehyde are first oxidation product of
A) Primary alcohol C) Tertiary alcohol
B) Secondary alcohol D) Dihydric alcohol
Q.10 Ketones are less reactive than aldehydes due to
A) Steric hindrance C) Less el...

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