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

1. 

2. 

3. 

4. 

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

(1) ethane 

(2) ethylene

(3) butane

(4) isobutane

Identify Z in the following series,

${\mathrm{CH}}_2={\mathrm{CH}}_2<mspace\; width="1em"></mspace>\stackrel{\mathrm{HBr}}{\to }<mspace\; width="1em"></mspace>X<mspace\; width="1em"></mspace>\stackrel{\mathrm{Hydrolysis}}{\to }<mspace\; width="1em"></mspace>Y<mspace\; width="1em"></mspace>\underset{{\mathrm{I}}_2<mspace\; width="1em"></mspace>\mathrm{excess}}{\overset{{\mathrm{Na}}_2{\mathrm{CO}}_3}{\to }}<mspace\; width="1em"></mspace>Z<mspace\; width="1em"></mspace>:$

1. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{I}$

2. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$

3. ${\mathrm{CHI}}_3$

4. ${\mathrm{CH}}_3\mathrm{CHO}$

Ozonolysis of propyne gives:

1. CH₃CHO               

2. CH₃COCHO

3. HCHO                   

4. CHOCHO

Propyne on oxidation with SeO₂ gives:

1. CHOCHO                   

2. CH₃CH₂CHO

3. CH₃COCHO               

4. CHOCH₂CHO

Acetylene and HCHO react in the 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

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

(1) CO₂ and H₂O

(2) HCHO

(3) HCOOH

(4) CH₃NO₂

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3\stackrel{{\mathrm{NaNH}}_2}{\to }\mathrm{X};<mspace\; width="1em"></mspace>\mathrm{what}<mspace\; width="1em"></mspace>\mathrm{is}<mspace\; width="1em"></mspace>\mathrm{X}?$

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

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