Question

1. The total no. of valence electrons in 4.2 g of N3- ion is-

2. A certain amount of a metal whose equivalent mass is 28 displaces 0.7L of H2 gasat S.T.P. from an acid hence mass of the element is-

3. Equivalent mass of a metal is 12 hence equivalent mass of its oxide is-

4. Mass and charge present on 2g mole of electron is=

Answer 1

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