NEET Chemistry Questions: differentiation & conversion - organic chemistry

A compound A of formula C₃H₆Cl₂ on reaction with alkali can give B of formula C₃H₆O or C of formula C₃H₄. B on oxidation gave a compound of the formula C₃H₆O. C with dilute H₂SO₄ containing Hg²⁺ ion gave D of formula C₃H₆O, which with bromine and NaOH gave the sodium salt of C₂H₄O₂. Then A is :

Identify the product (A) in following reaction series, ${\mathrm{CH}}_3\mathrm{CN}\stackrel{\mathrm{Na}/{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to }$(X)$\stackrel{{\mathrm{HNO}}_2}{\to }$(Y)$\stackrel{\left[\mathrm{O}\right]}{\to }$(Z)$\stackrel{\mathrm{Tollens} \mathrm{reagent}}{\to }$(A) :

Vapour density of an organic compound is 23.0. It contains 52.17% of carbon and 13% of hydrogen. The compound gives iodoform test. The compound is:

An amine is reacted with benzene sulphonyl chloride then a solid compound is formed which is insoluble in alkali. The amine is:

An organic compound X on treatment with acidified K₂Cr₂O, gives compound Y which reacts with I₂, and NaOH to form CHI₃. The compound X can be

Give test to differentiate 1,1-dichloroethane and 1, 2-dichloroethane:

The reagent used in dehydrohalogenation process is:

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

The reagent used in dehalogenation process is:

Zn-Cu couple used as reducing agent is:

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

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:

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

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

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