Q. Deficiency of Vitamin-D results in
(A) night blindness
(B) rickets
(C) scurvy
(D) hair fall
The answer is: (B) rickets ☑
Q. During winter in cold countries, the __________ is mixed to melt the ice on the icy roads.
(A) Salt
(B) Chlorine
(C) Carbon dioxide
(D) Water
The answer is: (A) Salt ☑
Q. The planet that moves round the Sun at the highest speed is
(A) Jupiter
(B) Venus
(C) Mars
(D) Mercury
The answer is: (D) Mercury ☑
Q. Oxidation is a chemical reaction involving the
(A) Gain of Electrons
(B) Loss of Electrons
(C) Gain of Protons
(D) Loss of Protons
The answer is: (B) Loss of Electrons ☑
Q. The position of an element in the Periodic Table is determined by its __________ number.
(A) Electron
(B) Proton
(C) Neutron
(D) Positron
The answer is: (B) Proton ☑