Cement is made hard with
1). dehydration
2). hydration and dissociation of water
3). Dissociation of water
4). Polymerisation
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2. Cement containing excess amount of lime
3. The gas involved in Bhopal incident was
5. What is the most common salt in sea water ?
6. The velocity of neutrons in nuclear reactor is slowed down by-
7. One of the constituents of tear gas is
9. Who played the lead character in the movie 'Bandit Queen'?
10. Detergents used for cleaning clothes and utensils contain