An active metal (M) gives its only oxide `MO_(2)`. Guess the metal. 

How is nickel oxide reduced to the metal ?

Least active metal among the following.

1 mole of chlorine combines with a certain mass of a metal giving 111g of its chloride. The atomic mass of the metal (assuming its valency to be 2) is

Which one of the alkali metals forms only the normal oxide, M_(2)O on heating in air ?

To extract the metal, the metallic oxide with

25 mL of 0.1 M solution of metallic salt (A) oxidised 25 mL of 0.1 M sodium sulphite to sodium sulphate. If oxidation number of the metal in the salt (A) is 3, then new oxidation number of the metal is __________

0.72 gm of an oxide of a metal M on reduction with H_(2) gave 0.64 g of the metal . The atomic weight of the metal is 64 . The empirical formula of the compound is

0.5g of a metal on oxidation gave 0.79g of its oxide. The equivalent mass of the metal is