Assertion : Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal.

Reason : Copper is extracted by hydrometallurgy.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Azeotropic mixtures are formed only by non-ideal solutions and they may have boiling points either greater than both the components or lesser than both the components.

Reason : The composition of the vapour phase is same as that ofthe liquid phase of an azeotropic mixture.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false.

43.

Lucas test is given by an alcohol within 5 minutes. 0.22 g of which liberates 56 mL of CH₄ at STP on treating with CH₃MgI. The structure of alcohol is

• CH₃ - CHOH - CH₃

• (CH₃)₂CH - CHOH - CH₃

• CH₃ - CH₂ - CHOH - CH₃

• (CH₃)₃C - CHOH - CH₃

The product P is

(CH₃)₃COCH₃ and CH₃OC₂H₅ are treated with hydroiodic acid. The fragments obtained after reactions are respectively

• (CH₃)₃CI + CH₃OH; CH₃I + C₂H₅OH

• (CH₃)₃CI + CH₃OH; CH₃OH + C₂H₅I

• (CH₃)₃COH + CH₃I; CH₃OH + C₂H₅I

• CH₃I + (CH₃)₃COH; CH₃I + C₂H₅OH

Identify X.

Consider the following set of reactions :

CH₃COOH $\stackrel{{\mathrm{SOCl}}_2}{\to }$A $\underset{\mathrm{Anhydrous} {\mathrm{AlCl}}_3}{\overset{\mathrm{Benzene}}{\to }}$ B $\stackrel{\mathrm{HCN}}{\to }$ C $\stackrel{\mathrm{HOH}}{\to }$ D

The structure of D would be

Among the following substituted silanes, the one which will give rise to cross-linked silicone polymer on hydrolysis is

• R₃SiCl

• R₄Si

• RSiCl₃

• R₂SiCl₂

What will be compound A in the following reaction?

C(CH₃)₃CH = CH₂ $\underset{\left(\mathrm{ii}\right) {\mathrm{NaBH}}_4, \mathrm{NaOH}}{\overset{\left(\mathrm{i}\right) \mathrm{Hg}({\mathrm{OOCCH}}_3{)}_2/ \mathrm{THF}}{\to }}$ A

Decreasing order of reactivity in Williamson synthesis of the following :

I. Me₃CCH₂Br

II. CH₃CH₂CH₂Br

III. CH₂=CHCH₂Cl

IV. CH₃CH₂CH₂Cl

• III > II > IV > I

• I > II > IV > III

• II > III > IV > I

• I > III > II > IV