281: A weightless rubber balloon is filled with 200 cc of water. Its weight in water is equal to:
(a) (9.8/5) N
(b) (9.8/10) N
(c) (9.8/2) N
(d) zero
282: Ashtapradhan was a Council of Ministers
(a) in the Gupta Administration
(b) in the Chola Administration
(c) in the Vijayanagar Administration
(d) in the Maratha Administration
283: Other than India and China, which of the following groups of countries border Myanmar ?
(a) Bangladesh, Thailand and Vietnam
(b) Thailand, Laos and Bangladesh
(c) Cambodia, Laos and Malaysia
(d) Thailand, Vietnam and Malaysia
284: Which of the following can be said as the 'Theory of Darwin'
(a) Survival of the fittest and struggle for existence
(b) Weak and strong always maintain a fixed proportion
(c) Different species do not arise by genetic mutation
(d) None of these
285: What is the principle by which a cooling system (Radiator) in a motor car works ?
(a) Convection
(b) Conduction only
(c) Both conduction and radiation
(d) Radiation only