CH₃CH=CHCHO is oxidized to CH₃CH=CHCOOH using-

1. Alkaline permanganate

2. Ammoniacal silver nitrate

3. Selenium dioxide

4. Osmium tetraoxide

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