61. A mixture of benzaldehyde and formaldehyde on heating with aqueous \[NaOH\] solution gives
A
benzyl alcohol and sodium formate
B
sodium benzoate and methyl alcohol
C
sodium benzoate and sodium formate
D
benzyl alcohol and methyl alcohol
Answer :
benzyl alcohol and sodium formate
62.
\[C{H_3} - C \equiv CH\xrightarrow[{1\% \,HgS{O_4}}]{{40\% \,{H_2}S{O_4}}}A\] \[\xrightarrow{\text{Isomerisation}}C{{H}_{3}}\underset{\begin{smallmatrix}
\parallel \\
O
\end{smallmatrix}}{\mathop{-C-}}\,C{{H}_{3}}\]
Structure of $$'A'$$ and type of isomerism in the above reaction are respectively
A
prop-1-en-2-ol, metamerism
B
prop-1-en-1-ol, tautomerism
C
prop-2-en-2-ol, geometrical isomerism
D
prop-1-en-2-ol, tautomerism
Answer :
prop-1-en-2-ol, tautomerism
63. Ketones \[(R\overset{\begin{smallmatrix} O \\ \parallel \end{smallmatrix}}{\mathop{-C-}}\,R')\] can be obtained in one step by ( where $$R$$ and $$R'$$ are alkyl groups )
A
hydrolysis of esters
B
oxidation of primary alcohols
C
oxidation of secondary alcohols
D
reaction of alkyl halides with alcohols
Answer :
oxidation of secondary alcohols
64.
Study the given reaction and identify the process which is carried out.
A
It is used for purification of aldehydes and ketones.
B
It is used to distinguish aldehydes from ketones.
C
It is used to prepare cyclic aldehydes and ketones.
D
It is used to study polar nature of aldehydes and ketones.
Answer :
It is used for purification of aldehydes and ketones.
65. In the following sequence of reaction, the final product $$(Z)$$ is \[CH\equiv CH\xrightarrow[{{H}_{2}}S{{O}_{4}}]{H{{g}^{2+}}}X\xrightarrow[{{H}_{2}}O]{C{{H}_{3}}MgX}\] \[Y\xrightarrow{\left[ O \right]}Z\]
A
ethanal
B
propan-2-ol
C
propanone
D
propan-1-ol
Answer :
propanone
66. Which one of the following on treatment with $$50\% $$ aqueous sodium hydroxide yields the corresponding alcohol and acid?
A
B
C
D
Answer :
67. An organic compound of molecular formula $${C_3}{H_6}O$$ did not give a silver mirror with Tollens' reagent but give an oxime with hydroxylamine. It may be
A
$$C{H_2} = CH - C{H_2} - OH$$
B
$$C{H_3}COC{H_3}$$
C
$$C{H_3}C{H_2}CHO$$
D
$$C{H_2} = CH - OC{H_3}$$
Answer :
$$C{H_3}COC{H_3}$$
68. Which of the following reaction can produce \[R-CO-Ar?\]
A
\[ArCOCl+H-Ar\xrightarrow{AlC{{l}_{3}}}\]
B
\[RCOCl+ArMgX\to \]
C
\[ArCOCl+RMgX\to \]
D
\[RCOCl+H-Ar\xrightarrow{AlC{{l}_{3}}}\]
Answer :
\[ArCOCl+H-Ar\xrightarrow{AlC{{l}_{3}}}\]
69.
Alkene $$\left( X \right)\left( {{C_5}{H_{10}}} \right)$$ on ozonolysis gives a mixture of two compounds $$(Y)$$ and $$(Z).$$ Compound $$(Y)$$ gives positive Fehling's test and iodoform test. Compound $$(Z)$$ does not give Fehling's test but give iodoform test. Compounds $$(X), (Y)$$ and $$(Z)$$ are
A
(a)
B
(b)
C
(c)
D
(d)
Answer :
(b)
is 2-methylcyclopentanecarboxylic acid