An alkene, obtained by the dehydration of an alcohol(A), on ozonolysis gives two molecules of acetaldehyde for every molecule of alkene. the alcohol (A) is:

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

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$

3. ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CHCH}}_2\mathrm{OH}$

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2\underset{\mathrm{OH}}{\underset{\mathrm{I}}{\mathrm{CH}}}{\mathrm{CH}}_3$

 

Propene on reaction with diazomethane in presence of UV radiations gives:

(1) cyclopropane

(2) methyl cyclopropane

(3) butane

(4) butene

The product formed during the reaction,

$\mathrm{CH}\equiv \mathrm{CH}+\mathrm{NaOCl}\stackrel{0°\mathrm{C}}{\to }\mathrm{is}:$
$$

(1) 1,2-dichloroethane

(2) 1,1-dichloroethane

(3) 1,2-dichloroethene

(4) 1,2-dichloroethyne

Identify Z in the following series,

${\mathrm{CH}}_2={\mathrm{CH}}_2 \stackrel{\mathrm{HBr}}{\to } X \stackrel{\mathrm{Hydrolysis}}{\to } Y \underset{{\mathrm{I}}_2 \mathrm{excess}}{\overset{{\mathrm{Na}}_2{\mathrm{CO}}_3}{\to }} Z :$

(1) ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{I}$

(2) ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$

(3) ${\mathrm{CHI}}_3$

(4) ${\mathrm{CH}}_3\mathrm{CHO}$

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