31.

Compound (A) when heated with ethyl magnesium iodide in dry ether forms an addition product, which on hydrolysis forms compound (B) Compound (B) on oxidation form 3-pantanone. Hence (A) and (B) are respectively 

• propanal, 3-pentanol

• pentanol, 3-pentanol

• ethanal, pentanol

• acetone, 3-pentanol

A colourless water soluble organic liquid decomposes sodium carbonate and liberates CO₂. It produces black ppt with Tollen's reagent. The liquid is

• acetaldehyde

• acetamide

• formic acid

• acetone

Order of ease of decarboxylation of the following acids is

(i) CH₃COOH

(ii) CH₂=CH-CH₂.COOH

(iii) CH₂(COOH)₂

(iv) 

• i > ii > iii > iv

• iii > iv > ii > i

• iv > iii > ii > i

• i > iii > ii > iv

The final product of the following sequence of reaction is

CH₂=CH₂ $\underset{{\mathrm{CCl}}_4}{\overset{{\mathrm{Br}}_2}{\to }}$ (A) $\stackrel{\mathrm{KCN}}{\to }$ (B) $\stackrel{{\mathrm{H}}^{+} / {\mathrm{H}}_2\mathrm{O}}{\to }$ (C)

The enol form of acetone, after treatment with D₂O gives

Which of the following compound (s) will give butanone on oxidation with alkaline KMnO₄ solution?

• Butan-1-ol

• Butan-2-ol

• Both (a) and (b)

• None of the above

The order of reactivity of the following alcohols is

• 1 > 2 > 3 > 4

• 1 > 3 > 2 > 4

• 4 > 3 > 2 > 1

• 4 > 3 > 1 > 2

The major product (P) in the following reaction is

CH₃CH₂I $\stackrel{\mathrm{NaCN}}{\to }$ (A) $\underset{\mathrm{Partial} \mathrm{hydrolysis}}{\overset{{\mathrm{OH}}^{-}}{\to }}$ (B) $\stackrel{{\mathrm{Br}}_2/ \mathrm{KOH}}{\to }$ (C)

• CH₃CH₂.NH₂

• CH₃CH₂.CO.NHBr

• CH₃.CH₂.COONH₄

• CH₃.CH₂.CO.NBr₂

Amine is not formed in the reaction

(i) hydrolysis of RCN
(ii) reduction of RCH = NOH
(iii) hydrolysis of RNC
(iv) hydrolysis of RCONH2

• (i), (ii) and (iv)

• (i) and (iv)

• (ii) and (iii)

• (i), (ii) and (iii)

Which of the following reagent is used to identify fructose?

• Neutral FeCl₃

• CHCH₃/ KOH (alcohol)

• Ammonical AgNO₃

• Iodine