An element forms an oxide `A_(2)O_(3)` which is acidic in nature. Identify A as a metal or non-metal.

An element X forms an oxide which turns red litmus blue. Identify whether X is a metal or non-metal.

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.

Whose oxides are basic in nature: Metal or non-metal?

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.

Whose oxides are acidic: Metal or non-metal?

An element, A from two oxides AO and AO_2 AO is neutral and AO_2 is acidic: indicate whether A is metal or non-metal

Metal A burns in air, on heating, to form an oxide A_(2)O_(3) whereas another metal B burns in air only on strong beating to form an oxide BO. The two oxides A_(2)O_(3) and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water. (a). What is the nature of oxide A_(2)O_(3) ? (b). What is the nature of oxide BO ? (c). Name one metal like A. (d). Name one metal like B.