The reagent used in dehydrohalogenation process is:

1. Alcoholic KOH

2. NaNH₂

3. C₂H₅ONa

4. All of these

The reaction, ${\mathrm{CH}}_2=\mathrm{CHCHO}\stackrel{\mathrm{HX}}{\to }\mathrm{gives}:$

1. CH₃CHXCHO

2. CH₂XCHCHO

3. CH₂=CHCHX₂

4. None of these

The reagent used in dehalogenation process is:

1. KOH alc.

2. Zn dust+ alc.

3. Na

4. KOH(aq)

An unknown compound A has a molecular formula C₄H₆. When A is treated with excess of Br₂ a new substance B with formula C₄H₆Br₄ is formed. A forms a white ppt. with ammoniacal silver nitrate solution. A may be-

1. But-1-yne

2. But-2-yne

3. But-1-ene

4. But-2-ene

The appropriate reagent for the following transformation,

  is :

1. Zn(Hg),HCl

2. NH₂NH₂, OH^-

3. H₂/Ni

4. NaBH₄

Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?

1.		2.
3.		4.

The reduction of an alkyne to alkene using Lindlar's catalyst results into:

1. Cis-addition of hydrogen atoms.

2. Trans-addition of hydrogen atoms.

3. A mixture obtained by cis- and trans-additions of hydrogen which are in equilibrium with each other.

4. A mixture obtained by cis- and trans-additions of hydrogen atoms which are not in equilibrium with each other.

Identify Z in the sequence:
$\mathrm{CH}_ 3-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow{\mathrm{HBr} / \mathrm{H}_2 \mathrm{O}_2} \mathrm{Y} \xrightarrow{\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}\mathrm{Na}^{+}} \mathrm{Z}$

1.
2.
3.	$\mathrm{CH}_3-\left(\mathrm{CH}_2\right)_3-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_3$
4.	$\mathrm{CH}_3-\left(\mathrm{CH}_2\right)_4-\mathrm{O}-\mathrm{CH}_3$

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