One light year is equal to

The resistance of a wire that must be placed parallel with a 12 Ω resistance to obtain a combined resistance of 4 Ω is

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