651: Helium is used for respiration in deep water instead of nitrogen because:
(a) It is heavier than nitrogen
(b) It is lighter than nitrogen
(c) It mixes less in blood than nitrogen
(d) It helps oxygen burn more quickly
652: After returning from South Africa, Gandhiji launched his first successful Satyagraha in
(a) Chauri-Chaura
(b) Dandi
(c) Champaran
(d) Bardoli
653: Consider the following events in Indian Freedom Movement :
1. Singh Sabha Movement
2. Quit India Movement
3. Dandi March
4. Gurdwara Reform Movement
The correct chronological sequence of these events is
(a) 1, 4, 3, 2
(b) 4, 1, 2, 3
(c) 2, 3, 4, 1
(d) 3, 2, 1, 4
654: According to the World Health Organisation, the disease which causes the death of the largest number of people today is
(a) AIDS
(b) Tuberculosis
(c) Malaria
(d) Ebola
655: Recently, the manuscripts of which one of the following have been included in the UNESCO's Memory of World Register?
(a) Abhidhamma Pitaka
(b) Ramayana
(c) Rig-Veda
(d) Mahabharta