(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
pH is an abbreviation for?
(A) Power of Hydrogen
(B) Possibility of Hydrogen
(C) Population of Hydrogen
(D) Position of Hydrogen
The answer is: (A) Power of Hydrogen
The average human body contains about _______ gram of Sodium Chloride.
(A) 190
(B) 210
(C) 230
(D) 250
The answer is: (D) 250
The substance which increases the rate of chemical reaction is
(A) Metal
(B) Catalyst
(C) Alloy
(D) Enzymes
The answer is: (B) Catalyst
The most abundant element in the universe is
(A) Hydrogen
(B) Oxygen
(C) Carbon dioxide
(D) Silicon
The answer is: (A) Hydrogen
When gas is ionized, ________ forms.
(A) Molecule
(B) Element
(C) Plasma
(D) Current
The answer is (C) Plasma
Hydrogen bomb is based on the principle of
(A) Nuclear fission
(B) Nuclear fusion
(C) Natural radioactivity
(D) Artificial radioactivity
The answer is (B) Nuclear fusion
The purest form of iron is
(A) Wrought iron
(B) Steel
(C) Pig iron
(D) Nickel steel
The answer is (A) Wrought iron
Which among the following happens in an oxidation reaction ?
(A) Electrons are gained
(B) Electrons are lost
(C) Protons are gained
(D) Protons are lost
The answer is (B) Electrons are lost