A dihalogen derivative (A) of a hydrocarbon having two carbon atoms reacts with alcoholic potash and forms another hydrocarbon which gives a red precipitate with ammoniacal solution of cuprous chloride. Compound ‘A' gives an aldehyde when treated with aqueous KOH. Write down the name and formula of the compound.

Compound ‘A’ with molecular formula C_4H_9Br is treated with aq. KOH solution. The rate of this reaction depends upon the concentration of the compound ‘A’ only. When another optically active isomer ‘B' of this compound was treated with aq. KOH solution, the rate of reaction was found to be dependent on concentration of compound and KOH both. Write down the structural formula of both compounds ‘A’ and 'B’.

An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous a solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A,B,C or D. Also write down the equations for the reaction involved.

A chloro derivative (A) on treatment with zinc copper couple gives a hydrocarbon (B) with five carbon atoms. When A is dissolved in ether and treated with sodium 2, 2, 5, 5- tetramethylhexane is formed. What is the formula of the compound A ?

A coordination compound CrCl_3 .4H_2O precipitates silver chloride with AgNO_3 . The molar conductivity of the solution corresponds to a total number of two ions. Write structural formula of the compound and name it.

When SO_3 is bubbled through a solution of H_2SO_4 , a compound X is formed which further reacts with water to give H_2SO_4 . Explain the reaction.

A coordination complex compound of cobalt has molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution. On reacting this solution with excess of silver nitrate solution, two moles of AgCl get precipitated. The formula of this compound would be

Aniline is treated with NaNO_2//HCl at 0^@C to give compound X which on treatment with cuprous cyanide gives another compound Y. When compound Y is treated with H_2//Ni compound Z is obtained. The compound Z is

Compound ‘A’ with molecular formula C_4H_9Br is treated with aq. KOH solution. The rate of this reaction depends upon the concentration of the compound ‘A’ only. When another optically active isomer ‘B' of this compound was treated with aq. KOH solution, the rate of reaction was found to be dependent on concentration of compound and KOH both. Out of these two compounds, which one will be converted to the product with inverted configuration.

An optically active compound having molecular formula C_7H_15Br reacts with KOH to give a racemic mixture of products. Write the mechanism involved for this reaction.