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In an experiment, 4g of M(2)O(x) (oxide)...

In an experiment, 4g of `M_(2)O_(x)` (oxide) was reduced to 2.8g of the metal. If the atomic mass of metal is 56, the number of oxygen atoms in the oxide is

A

1

B

2

C

3

D

4

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BRILLIANT PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-LEVEL-I
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  20. The number of electrons present in 5.6 litre of H2 gas at S.T.P is

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  21. 10g of CaCO(3) contains

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