R-X 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
CH3CHO + CH3CHO 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
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
C.
Nylon - 66
Nylon - 66 is a polyamide of hexamethylene diamine , (CH2)6(NH2)2 and adipic acid , (CH2)4(COOH)2 .
(Each reactant has six-carbon chain , hence trade code (66) is used)
Tertiary alkyl halides are practically inert towards substitution by SN2 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) .