Which one of the following is used as moderator in nuclear reactors?
Consider the following equation for the formation of ammonia from nitrogen and hydrogen :
N2+ 3H2 = 2NH3
How many hydrogen molecules are required to react with 100 molecules of nitrogen?
Which among the following is an element
Which among the following is a chemical change?
Which among the following is the major constituent of soda lime glass?
Which one among the following is the most appropriate statement with respect to the atomic weight of an element?