Identify Z in the sequence,

$\mathrm{CH}3-{\mathrm{CH}}_2-\mathrm{CH}={\mathrm{CH}}_2\stackrel{\mathrm{HBr}/{\mathrm{H}}_2{\mathrm{O}}_2}{\to }\mathrm{Y}\stackrel{{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{O}}^{-}-{\mathrm{Na}}^{+}}{\to }\mathrm{Z}:$

1. $\mathrm{CH}3-\underset{{\mathrm{CH}}_3}{\underset{\mathrm{I}}{\mathrm{CH}}}-{\mathrm{CH}}_2-\mathrm{O}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

2. $\mathrm{CH}3-{\mathrm{CH}}_2-\underset{{\mathrm{CH}}_3}{\underset{\mathrm{I}}{\mathrm{CH}}}-{\mathrm{CH}}_2-\mathrm{O}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

3. ${\mathrm{CH}}_3-({\mathrm{CH}}_2{)}_3-\mathrm{O}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3-({\mathrm{CH}}_2{)}_4-\mathrm{O}-{\mathrm{CH}}_3$

Acetylene can be converted to higher alkyne using the following sequence of reactions:

(1) Na,RX

(2) RMg X,R X

(3) either of these two

(4) none of these

$\mathrm{R}-\mathrm{COOH}$$\to$RCH₂OH. This mode of reduction can be effected only by:

1. NaBH₄

2. KMnO₄

3. LiAIH₄

4. All of the above

Propene, CH₃-CH=CH₂ can be converted into 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion?

(1) Alkaline KMnO₄

(2) B₂H₆ and alk. H₂O₂

(3) O₃/zinc dust

(4) OsO₄/CHCl₃

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