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NEET Chemistry : Haloalkanes and Haloarenes

Multiple Choice Questions

41.

Consider the following reaction sequence

CH₃OH $\overset{HBr}{\to}$ 'A' $\overset{K C N}{\to}$ 'B' $\overset{H_{2} / Ni}{\to}$ 'C' $\overset{{HNO}_{2}}{\to}$ 'D'

Choose the correct option regarding the different products obtained in the above reaction sequence:

'D' is an alcohol consisting one carbon more than the starting alcohol
Product 'B' is formed via S_N2-pathway
'C' is an amine
All of the above

42.

The product P of the given reaction is

43.

In the reaction

C₇H₈ $\overset{3 {Cl}_{2} / ∆}{\to}$ X $\overset{{Br}_{2} / Fe}{\to}$ Y $\overset{Zn / HCl}{\to}$ Z

Z is

o-bromotoluene
m-bromotoluene
p-bromotoluene
3-bromo-2, 2, 6- trichlorotoluene

44.

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of

acyl chloride > acid anhydride > ester > amide
ester > acyl chloride > amide > acid anhydride
acid anhydride > amide > ester > acyl chloride
acyl chloride> ester> acid anhydride > amide

45.

For carbanion

Stability order will be

P > Q > S > R
P > R > Q > S
Q > R > S > R
S > R > Q > P

46.

Choose the correct alkyne and reagents for the preparation of

47.

The major product P will be

48.

The molal freezing point depression constant for benzene (C₆H₆) is 4.90 K Kg mol^-1. Selenium exists as a polymer of the type Se_x. When 3.26 g of selenium is dissolved in 226 g of benzene, the observed freezing point is 0.112 $°$ C lower than that of pure benzene. The molecular formula of selenium is (atomic mass of Se = 78.8 g mol^-1).

Se₈
Se₆
Se₄
Se₂

49.

The suitable reaction steps to carry out the following transformation is

$\to_{(ii) H_{2} O_{2}, NaOH}^{(i) {BH}_{3}, THF} \overset{{HIO}_{4}}{\to}$
$\to_{({CH}_{3})_{3} C . COOH, {OH}^{-}}^{{OsO}_{4}} \to_{H_{2} O}^{K_{3} {Cr}_{2} O_{7} . H_{2} {SO}_{4}}$
$\to_{(ii) H_{2} O_{2}, NaOH}^{(i) {BH}_{3}, THF} \to_{{CH}_{2} {Cl}_{2}}^{PCC}$
$\overset{H_{2} O, H_{2} {SO}_{4} (dil)}{\to} \to_{{CH}_{2} {Cl}_{2}}^{PCC}$

50.

X, Y and Z respectively are

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Subject

NEET Chemistry : Haloalkanes and Haloarenes

Multiple Choice Questions