An organic compound (A) (MF C₄H₁₀O) upon
dehydrogenation gives a compound (B) which forms
phenyl hydrazone with phenylhydrazine and both the
compounds (A) and (B) respond to iodoform test.
Hence, the compound (A) is

The appropriate reagent for the transformation is

1. Zn (Hg)/HCl

2. NH₂–NH₂/OH^–

3. Both 1. and 2.

4. None of the above

When propanoic acid is treated with aqueous sodium
bicarbonate, CO₂ is liberated. The ‘C’ of CO₂
comes from

1. carboxylic acid group
2. methylene group
3. bicarbonate
4. methyl group

Which carboxylic acid is least reactive towards
decarboxylation on heating?

The end product of the following reaction would be

$\underset{\left(\mathrm{ii}\right) ∆}{\overset{\left(\mathrm{i}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}{\to }}$

Identify (X) in the sequence :

$C_3{H}_{8}O\underset{H_{2}S{O}_4}{\overset{K_{2}C{r}_2{O}_7}{\to }}{C}_3{H}_{6}O\underset{warm}{\overset{I_2+NaOH}{\to }}CH{I}_3$
$\left(X\right)$

(1) $C{H}_3-C{H}_2-C{H}_{2}OH$

(2) $C{H}_3-CH-C{H}_3$
$l$
$OH$

(3) $C{H}_3-O-C{H}_2-C{H}_3$

(4) $C{H}_3-C{H}_2-CHO$

$R-C{H}_2-C{H}_2-OH$ can be converted into $R-C{H}_2-C{H}_2-COOH$. The correct sequence of

reagents is

(1) $PB{r}_3, KCN, H_3{O}^{+}$

(2) $PB{r}_3, KCN, H_2$

(3) $KCN, H_3{O}^{+}$

(4) $HCN, PB{r}_3, H_3{O}^{+}$

Major product maybe

1.       2.  

3.       4.  

Given the reaction:
 + 

Which of the following statements is correct?

1. (b) has a lesser stability

2. (b) is more volatile than (a)

3. (a) is more volatile than (b)

4. (a) forms higher yields at a lower temperature

1.       2.  

3.       4.