31. The compound that does NOT liberate $$C{O_2}$$ , on treatment with aqueous sodium bicarbonate solution, is
A
Benzoic acid
B
Benzenesulphonic acid
C
Salicylic acid
D
Carbolic acid (Phenol)
Answer :
Carbolic acid (Phenol)
32. Acetic acid can be halogenated in presence of phosphorus and chlorine. Formic acid cannot be halogenated with same way because of
A
presence of $$\alpha {\text{ - }}H$$ atom in formic acid
B
presence of $$\alpha {\text{ - }}H$$ atom in acetic acid
C
absence of $$\alpha {\text{ - }}H$$ atom in $$C{H_3}COOH$$
D
higher acidic strength of acetic acid than formic acid
Answer :
presence of $$\alpha {\text{ - }}H$$ atom in acetic acid
33.
\[\xrightarrow[\left( ii \right)\,{{H}^{+}}/{{H}_{2}}O]{\left( i \right)\,NaOH/{{100}^{\circ }}C}?\]
The major product in the above reaction is
A
B
C
D
Answer :
34. An ester $$(A)$$ with molecular formula $${C_9}{H_{10}}{O_2}$$ was treated with excess of $$C{H_3}MgBr$$ and the complex so formed was treated with $${H_2}S{O_4}$$ to give an olefin $$(B).$$ Ozonolysis of $$(B)$$ gave a ketone with molecular formula $${C_8}{H_8}O$$ which shows $$+ve$$ iodoform test. The structure of $$(A)$$ is
A
$${C_6}{H_5}COO{C_2}{H_5}$$
B
$$C{H_3}COC{H_2}CO{C_6}{H_5}$$
C
$$p{\text{ - }}C{H_3}O{\text{ - }}{C_6}{H_4}{\text{ - }}COC{H_3}$$
D
$${C_6}{H_5}COO{C_6}{H_5}$$
Answer :
$${C_6}{H_5}COO{C_2}{H_5}$$
35. Which of the following reactions does not occur?
A
B
C
D
Answer :
36. \[C{{H}_{3}}C{{H}_{2}}COOH\xrightarrow[\text{red}\,P]{C{{l}_{2}}}A\] \[\xrightarrow{\text{alc}\text{.}\,KOH}B.\] What is $$B$$ ?
A
$$C{H_3}C{H_2}COCl$$
B
$$C{H_3}C{H_2}CHO$$
C
$$C{H_2} = CHCOOH$$
D
$$ClC{H_2}C{H_2}COOH$$
Answer :
$$C{H_2} = CHCOOH$$
37.
In a set of the given reactions, acetic acid yielded a product $$C.$$
$$C{H_3}COOH + PC{l_5} \to $$ \[A\xrightarrow[\text{ Anhy}.\,AlC{{l}_{3}}]{{{C}_{6}}{{H}_{6}}}B\xrightarrow[\text{ether}]{{{C}_{2}}{{H}_{5}}MgBr}C\]
Product $$C$$ would be
A
$$C{H_3}CH\left( {OH} \right){C_2}{H_5}$$
B
$$C{H_3}CO{C_6}{H_5}$$
C
$$C{H_3}CH\left( {OH} \right){C_6}{H_5}$$
D
\[\overset{\begin{smallmatrix}
{{C}_{2}}{{H}_{5}}\, \\
|\,\,\,\,\,\,\,\,\,
\end{smallmatrix}}{\mathop{C{{H}_{3}}-C\left( OH \right){{C}_{6}}{{H}_{5}}}}\,\]
Answer :
\[\overset{\begin{smallmatrix}
{{C}_{2}}{{H}_{5}}\, \\
|\,\,\,\,\,\,\,\,\,
\end{smallmatrix}}{\mathop{C{{H}_{3}}-C\left( OH \right){{C}_{6}}{{H}_{5}}}}\,\]
38. Which of the following orders is not correct for the acidic character?
A
$$C{H_3}C{H_2}CH\left( {Cl} \right)COOH > $$ $$C{H_3}CH\left( {Cl} \right)C{H_2}COOH > $$ $$C{H_2}\left( {Cl} \right)C{H_2}C{H_2}COOH > $$ $$C{H_3}C{H_2}C{H_2}COOH$$
B
$$IC{H_2}COOH < BrC{H_2}COOH$$ $$ < ClC{H_2}COOH < FC{H_2}COOH$$
C
$$CC{l_3}COOH < CHC{l_2}COOH$$ $$ < C{H_2}ClCOOH < C{H_3}COOH$$
D
$$HCOOH > C{H_3}COOH > $$ $${C_2}{H_5}COOH > {\left( {C{H_3}} \right)_2}CHCOOH$$
Answer :
$$CC{l_3}COOH < CHC{l_2}COOH$$ $$ < C{H_2}ClCOOH < C{H_3}COOH$$
39. Which one of the following orders of acid strength is correct ?
A
\[RCOOH>HOH>ROH>HC\equiv CH\]
B
\[RCOOH>HOH>HC\equiv CH>ROH\]
C
\[RCOOH>HC\equiv CH>HOH>ROH\]
D
\[RCOOH>ROH>HOH>HC\equiv CH\]
Answer :
\[RCOOH>HOH>ROH>HC\equiv CH\]
40. The end product $$(Z)$$ in the given sequence of reactions is \[C{{H}_{3}}CH=CHCHO\xrightarrow{NaB{{H}_{4}}}\] \[X\xrightarrow[ZnC{{l}_{2}}]{HCl}Y\xrightarrow[\left( \text{ii} \right)\,{{H}^{+}}]{\left( \text{i} \right)\,KCN}Z\]
A
$$C{H_3}CH = CHC{H_2}COOH$$
B
$$C{H_3}C{H_2}C{H_2}COOH$$
C
$$C{H_3}CH = CHCOOH$$
D
$$C{H_3}CH\left( {Cl} \right)C{H_2}COOH$$
Answer :
$$C{H_3}CH = CHC{H_2}COOH$$
