Q. The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are
(A) $\mathrm{BrCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$ and $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CH}$
(B) $\mathrm{BrCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$ and $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CH}$
(C) $\mathrm{BrCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$ and $\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CH}$
(D) $\mathrm{BrCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$ and $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CH}$
[IIT-2010]
Q. Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure.
The correct order of their boiling point is
(A) I > II > III
(B) III > II > I
(C) II > III > I
(D) III > I > II
[IIT-2014]
The correct order of their boiling point is
(A) I > II > III
(B) III > II > I
(C) II > III > I
(D) III > I > II
[IIT-2014]
Paragraph For Question 3 and 4 Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both the schemes.
Q. The product X is –
[IIT-2014]
[IIT-2014]
Q. The correct statement with respect to prodcut Y is –
(A) It gives a positive Tollens test and is a functional isomer of X
(B) It gives a positive Tollens test and is a geometrical isomer of X
(C) It gives a positive Iodoform test and is a functional isomer of X
(D) It gives a positive Iodoform test and is a geometrical isomer of X
[IIT-2014]
Q. Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is (are) –
[IIT-2015]
[IIT-2015]
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Sol. (B,D)
Paragraph For Questions 6 and 7 In the following reaction
Q. Compound X is :
[IIT-2015]
[IIT-2015]
Q. The major compound Y is :
[IIT-2015]
[IIT-2015]
require many more questions
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