CBSE
Multiple Choice QuestionsThe chemical name for melamine is
1,3,5-Triamino-2,4,6-triazine
2,4,6-Triamino-1,3,5-triazine
2-Amino-1,3,5-triazine
2,4-Diamino-1,3,5-triazine
Hofmann's bromamide reaction is used to convert :
acid to alcohol
alcohol to acid
amide to amine
amine to amide
The compound which on reaction with aqueous nitrous acid at low temperature produces an oily nitrosoamine is
methyl amine
ethyl amine
diethyl amine
triethyl amine
RNO2 is reduced with Sn/HCl .Product formed is :
RNHOH
RNH2
RNH3+
R2NH
Which of the following fibres is not made up of polyamides ?
Wool
Natural silk
Artificial silk
Nylon
Compound A (molecular formula C3H8O) is treated with acidified potassium dichromate to form a product B (molecular formula C3H6O). B forms a shining silver mirror on warming with ammoniacal silver nitrate. B when treated with an aqueous solution of H2NCONHNH2. HCl and sodium acetate gives a product C. Identify the structure of C.
CH3CH2CH=NNHCONH2
CH3-C(CH3)=NNHCONH2
CH3-C(CH3)=NCONHNH2
CH3CH2CH=NCONHNH2
N2 gas is liberated when [HCl + NaNO2] reacts with the following compound :
(A) CH3CH2NH2 (B) Urea
(C) CH3CONH2 (D) C6H5NH2
The answer is :
A , B , C
A , B , D
A, C , D
B , C , D
Acetamide when heated with PCl5 gives :
CH3Cl
CH3CN
CH3CCl2NH2
CHCl2CONH2
Which of the following reactions does not yield an amine?
R-X + NH3
R-CHNOH + [H]
R-CN +H2O
R-CONH2
Bromine is added to cold dilute aqueous solution ofNaOH. The mixture is boiled. Which of the following statements is not true?
During the reaction bromine is present in four different oxidation states.
The greatest difference between the various oxidation states of bromine is 5.
On acidification ofthe final mixture bromine is formed.
Disproportionation of bromine occurs during the reaction.
