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
Tertiary alkyl halides are practically inert towards substitution by SN2 mechanism because of :
steric hindrance
inductive effect
instability
insolubility
A.
steric hindrance
In SN2 reaction , nucleophile and alkyl halide react in one step .
Here , it is evident that tertiary carbon is under steric hindrance , thus reaction does not take place until (C-Br) bond breaks
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) .