(A) HNO3
(B) H2CO3
(C) CH4
(D) H2SO4
The most important Oligosaccharides is?
(A) Glucose
(B) Sucrose
(C) Fructose
(D) Maltose
Concentration of the copper ore is carried out by?
(A) Roasting
(B) Calcination
(C) Froth Flotation process
(D) Distillation
Permanent hardness can be removed by adding?
(A) Soda lime
(B) Lime water
(C) Quick lime
(D) Na2 zeolite
___ protects the earth surface from ultraviolet radiations.
(A) N2
(B) O3
(C) CO
(D) CO2
___ is a disaccharide.
(A) Fructose
(B) Glucose
(C) Starch
(D) Sucrose
Alkenes are prepared from alcohols by a process called?
(A) Dehydration
(B) Dehydrogenation
(C) Dehalogenation
(D) Dehydro Halogenation
In laboratory urea was prepared by?
(A) Rutherford
(B) Wohler
(C) Berzellius
(D) Dalton