A metal, A which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. write down the reactions of oxide B with HCl and NaOH.

An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with watr gives back B. identify A, B and C and give the reacitons involved.

A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry. This element is presented in bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved.

An element M forms an oxide M_2O_3 . Which is acidic in nature. State whether the element M is a metal or a non-metal.

A metal carbonate X, and a metal bicarbonate Y on reacting with an acid gives a gas which turns lime water milky. Write the chemical equatins for the reaction of X and Y with the acid.

A non-metal A which is the largest consituent of air, when heated with H_2 in 1:3 ratio in the presence of catalyst gives a gas B. on 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. Identify A,B,C and D.

A non-metal A which is the largest consituent of air, when heated with H_2 in 1:3 ratio in the presence of catalyst gives a gas B. on 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. To which group of periodic table does this non-metal belong?

An alkali metal A gives a compound B on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A,B and C and give the reactions involved.

An element x reacts with oxide to from oxide, X_2O which dissolves in water and turns red litmus solution blue, give the nature of oxide and indicate X is metal or non-metal.

An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous a solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A,B,C or D. Also write down the equations for the reaction involved.

Which name is used for metal oxide which show acidic or basic behaviour?