A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming.
(a) Identify A, B and C.
(b) To which group of periodic table does A belong? 

The non-metal A is an imporant constituent of our food and most of the fuels around us A forms two oxides B and C . The oxides B is poisonous whereas oxide C causes global warming. (a) Identify A,B and C (b) To which group of periodic table does A belong? (c) Name another element which is placed in the same group as A

A nonmetal 'X' is an important constituent of all living organisms and it forms two oxides Y and Z which are gases. Y is toxic while Z is responsible for global warming. Identify X, Y and Z.

A non-metal A which is the largest constituent of air, when heated with H2 in 1 : 3 ratio in the presence of catalyst (Fe) gives a gas B. 0n heating with O_(2) it gives an oxide C. If this oxide is passed into water in the presence of air, it gives an acid D which acts as a strong oxidising agent. (a) Identify A, B, C and D. (b) To which group of the periodic table does this non-metal belongs?

An element A on combining with O_2 produces an oxide A_2O which is basic in nature. (a) How many electrons must be there in the outermost shell of the element A? (b) To which group of periodic table it belongs? (c ) Identify whether it is a metal or non-metal.

An element X combines with oxygen to form an oxide XO . This oxide is electrically conducting. (a) How many electrons would be there in the outermost shell of the element X ? (b) To which group of the periodic table does the element X belong? (c) Write the formula of the compound formed when X reacts with chlorine.