766: Which one of the following statements is correct?
(a) Liquid Sodium is employed as a coolant in nuclear reactors
(b) Calcium carbonate is an ingredient of toothpaste
(c) Bordeaux mixture consists of sodium sulphate and lime
(d) Zinc amalgams are used as a dental filling
767: A girl is swinging on a swing in sitting position. When the same girl stands up, the period of swing will
(a) be shorter
(b) be longer
(c) depend on the height of the girl
(d) not change
768: Panchayati Raj is mainly aimed at:
(a) Rural employment
(b) Agricultural and rural industries development
(c) Political awareness among village people
(d) Giving training to villagers for fighting elections
769: The film The Making of the Mahatma has been directed by
(a) Peter Ustinov
(b) Richard Attenborough
(c) Shyam Benegal
(d) Mira Nair
770: Consider the following diseases :
1. Diphtheria
2. Chickenpox
3. Smallpox
Which of the above diseases has/ havebeen eradicated in India?
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None