(A) Mass
(B) Size
(C) Shape
(D) All of these
The answer is (c) Shape
Isotopes are atoms of the same element with different numbers of
(A) Protons
(B) Electrons
(C) Neutrons
(D) Positron
The answer is (A) Protons
The most abundant constituent in Air is
(A) Oxygen
(B) Hydrogen
(C) Carbondioxide
(D) Nitrogen
The answer is (D) Nitrogen
__________ are biological catalysts.
(A) Enzymes
(B) Minerals
(C) Proteins
(D) Vitamins
The answer is (A) Enzymes