Aldehydes, Ketones and Carboxylic Acids MCQs
1. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives
(a) benzyl alcohol + sodium formate
(b) sodium benzoate + methanol
(c) benzyl alcohol + methanol
(d) sodium benzoate + sodium formate
Answer:::: (a)
2. Which of the following has the most acidic hydrogen?
(a) hexane-2,4-dione
(b) hexane-2,3-dione
(c) hexane-2,5-dione
(d) hexane-3-one
Answer:::: (a)
3. A new C-C bond formation is possible in
(a) cannizzaro reaction
(b) friedel crafts reaction
(c) clemmensen reduction
(d) reimer tiemann reaction
Answer:::: (b,d)
4. Under Wolff-Kishner reduction conditions, the conversions which may be brought about are
(a) cyclohexanone into cyclohexane
(b) benzaldehyde into benzyl alcohol
(c) cyclohexanone into cyclohexanol
(d) benzophenone into diphenylmethane
Answer:::: (a,d)
5. The formation of cyanohydrin from a ketone is an example of
(a) electrophilic addition
(b) nucleophilic addition
(c) nucleophilic substitution
(d) electrophilic substitution
Answer:::: (b)
6. Benzoic acid reacts with conc.HNO3 and conc.H2SO4 to give
(a) o-nitrobenzoic acid
(b) p-nitrobenzoic acid
(c) m-nitrobenzoic acid
(d) o,p-dinitrobenzoic acid
Answer:::: (c)
7. An inorganic compound producing an organic compound on heating is
(a) ammonium cyanate
(b) soda lime
(c) sodamide
(d) potassium cyanide
Answer:::: (a)
8. The reaction of ethyl formate with an excess of CH3MgI followed by hydrolysis gives
(a) ethanol
(b) n-propyl alcohol
(c) propanal
(d) isopropyl alcohol
Answer:::: (d)
9. Formic acid and acetic acid are distinguished by reaction with
(a) sodium ethoxide
(b) sodium
(c) HgCl2
(d) 2,4-dinitrophenylhydrazine
Answer:::: (c)
10. Heating a mixture of sodium benzoate and soda lime gives
(a) calcium benzoate
(b) benzene
(c) sodium benzoate
(d) methane
Answer:::: (b)
