Zinc-copper couple that can be used as a reducing agent is obtained by:

(1) mixing zinc dust and copper gauze

(2) zinc coated with copper

(3) copper coated with zinc

(4) zinc and copper wires welded together

Methane reacts with conc. HNO₃ at high temperature to yield:

(1) CO₂ and H₂O

(2) HCHO

(3) HCOOH

(4) CH₃NO₂

Ozonolysis of propyne gives:

1. CH₃CHO               

2. CH₃COCHO

3. HCHO                   

4. CHOCHO

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3\stackrel{{\mathrm{NaNH}}_2}{\to }\mathrm{X}; \mathrm{what} \mathrm{is} \mathrm{X}?$

1. ${\mathrm{CH}}_3-{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{C}\equiv \mathrm{CH}$

3.

4. CH₂=C=CH-CH₃

Propyne on oxidation with SeO₂ gives:

(1) CHOCHO                   

(2) CH₃CH₂CHO

(3) CH₃COCHO               

(4) CHOCH₂CHO

When an alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is:

(1) ethane 

(2) ethylene

(3) butane

(4) isobutane

Acetylene and HCHO react in presence of copper acetylide catalyst to form:

(1) 2-butyne-1,4-diol

(2) 1-butyne-1,4-diol

(3) 2-butyne-1,2-diol

(4) none of these

What would be the product formed when 1-bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether?

1. 

2. 

3. 

4. 

Which of the following reagents would distinguish cis-cyclopenta-1, 2-diol from the trans-

isomer?

1. Ozone

2. MnO₂

3. Aluminium isopropoxide

4. Acetone

In following reaction, find out X and Y.

$\mathrm{In} \mathrm{the} \mathrm{reaction},$
$\mathrm{H}-\mathrm{C}\equiv \mathrm{C}-\mathrm{H} \underset{\left(\mathrm{ii}\right){\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Br}}{\overset{\left(\mathrm{I}\right){\mathrm{NaNH}}_2/\mathrm{liq}.{\mathrm{NH}}_3}{\to }}\mathrm{X}$
$\mathrm{X}\underset{\left(\mathrm{ii}\right){\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Br}}{\overset{\left(\mathrm{i}\right){\mathrm{NaNH}}_2/\mathrm{liq}.{\mathrm{NH}}_3}{\to }}{\mathrm{Y}}_{}^{}$

1. X=2-butyne ; Y=3-hexyne

2. X=2-butyne ; Y=2-hexyne

3. X=1-butyne ; Y=2-hexyne

4. X=1-butyne ; Y=3-hexyne