Which of the following fibres is not made up of polyamides ?
Wool
Natural silk
Artificial silk
Nylon
The high oxidising power offluorine is due to :
high electron affinity
high heat of dissociation and low heat of hydration
high heat of hydration and low heat of dissociation
high heat of hydration and high heat of dissociation
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and thenheated with cuprous bromide. The reaction mixture so formed contains
mixture of o- and m-bromotoluenes
mixture of o- and p-bromotoluenes
mixture of o- and p-dibromobenzenes
mixture of o- and p-bromoanilines
The reaction of an organic compound with ammonia followed by nitration of the product gives a powerful explosive called ROX.The organic compound is
phenol
toluene
glycerine
formaldehyde
In the following sequence of the reactions, what is D ?
Primary amine
An amide
Phenyl isocyanate
A chain lengthed hydrocarbon
Which of the following amines will not give N2 gas on treatment with nitrous acid (NaNO2 + HCl)?
C2H5NH2
CH3NH2
(CH3)2CH-NH2
All will give N2
Order of hydrolysis for the following :
RCOCl
RCOOR
RCONH2
(RCO)2O
A.
RCOCl
In acid derivatives acid chlorides is most reactive , it is vigorously hydrolysed by water .
CH3COCl + H2O CH3COOH + HCl
Acid anhydride is less reactive than acid chlorides .It is hydrolysed slowly by water .
(CH3CO)2O + H2O 2CH3COOH
The hydrolysis of ethyl acetate in boiling water is slow but inthe presence of acid or alkali the reaction is fast .
CH3CO-OC2H5 + H2O CH3COOH + C2H5OH
Amides are hydrolysed by water very slowly .
R--NH2 + H2O R-COOH + NH3
Thus , the correct order of hydrolysis is
RCOCl > (RCO)2O > RCOOR > RCONH2