How many carbon atoms are joined in buckminsterfullerene?

A catalyst is a substance that_________ the velocity of a chemical reaction.

On heating copper powder in air, a layer of copper oxide accumulates on its surface. What is the color of this layer?

Which of the following is not oxidized?

Food is cooked in a metal utensil because it is the source of heat.

What type of chemical reaction is combustion of natural gas?

In which state of matter, the distance between the molecules is minimum ?

Water in case of HCl acts as a/an ___________, in case of ammonia acts as a/an ________