Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

(1) Chlorination, nitration, reduction

(2) Nitration, chlorination, reduction

(3) Nitration, reduction, chlorination

(4) Nitration, reduction, acylation, chlorination, hydrolysis

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.

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,

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

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