The compound which on reaction with aqueous HNO2 at low temperature produces an oily nitrosoamine is
methyl amine
ethyl amine
diethyl amine
aniline
Amongst the following the most basic compund is
benzyl amine
aniline
acetanilide
p -nitroaniline
Polymerisation in which two or more chemically different monomers take part, is called
addition polymerisation
co-polymerisation
chain polymerisation
homo polymerisation
Which carbohydrate is an essential constituent of plant cells?
Starch
Cellulose
Sucrose
Vitamins
The deficiency of vitamin -B1 causes
beri-beri
scurvy
rickets
anaemia
A.
beri-beri
Beri-beri is caused by deficiency of vitamin-B1.