Non-conductors, whose polarization is caused by an electric field, are known as

Which one of the following chemicals is used in beauty parlours for hair-setting?

Two elements gallium and oxygen combine to form a compound Ga₂O₃. Which among the following is the valency of gallium?

Match List I with List II and select the correct answer using the code given below the lists

Which one of the following contains maximum percentge of nitrogen by mass?

Which one of the following is used as moderator in nuclear reactors?