R-X $\stackrel{Reagent}{\to }$ R-NO₃ , for the completion of the reaction suitable reagent is :

• NO₂

• NaNO₂

• AgNO₂

• NaNO₂ + dil. HCl

The use of CCl₄ as fire extinguisher depends on the fact that :

• it is an inorganic compound

• it is an organic compound

• its vapour is much heavier than air and non-combustible

• it is a compound of chlorine

Ether on carbonylation gives :

• alkanoic acid

• alkanone

• alkyl alkanoate

• alkanal

CH₃CHO + CH₃CHO $\stackrel{\mathrm{Dil} {\mathrm{OH}}^{-}}{\to }$ CH₃CH(OH)CH₂CHO , the intermediate in the above reaction is :

• carbanion

• carbonium ion

• carbene

• None of these

Ethanol shows intermolecular H-bonding .Which of the following property is affected by H-bonding ?

• Volatility

• Boiling point

• Solubility

• All of these

How many $\mathrm{\alpha }$-hydrogens are diethyl ether ?

• 10

• 6

• 4

• 2

57.

Which one of the following types of drugs reduces fever ?

• Tranquiliser

• Antibiotic

• Antipyretic

• Analgesic

Which of the following is a polyamide ?

• Bakelite

• Terylene

• Nylon - 66

• Teflon

Tertiary alkyl halides are practically inert towards substitution by S_N2 mechanism because of :

• steric hindrance

• inductive effect

• instability

• insolubility

Select the statement which is not true ?

• Nylon fibres are elastic .

• Nylon fibres are not crease resistant .

• Nylon fibres are used in parachute .

• Both (b) and (c) .