201024. In an experiment, 4 g of M2O, oxide was reduced to2.8 g of the metal. If the atomic mass of the metal is56 g mol-, the number of O atoms in the oxide i(a) 1(c) 3(b) 2(d) 4(AFMC)

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Q. In an experiment, 4 g of

M_{2} O_{x}

oxide was reduced to

2.8 g

of the metal. If the atomic mass of the metal is

56 g m o l^{- 1}

. The number of

O -

atoms in the oxide is:

Q. In an experiment 4 gm of

M_{2} O_{x}

oxide is reduced to 2.8 gm of metal. If the atomic wt Of metal is 56 gm/mol. Find the number of oxygen atoms in the oxide.

On being heated in oxygen 5.72 g of red metallic oxide A was converted to 6.36 g Black metallic oxide B. When 4.77 g of B was heated in a stream of H₂ gas, 3.81 g of metal M was formed. ( Atomic weight of metal is 63.50 g) Find

The formula of Red metallic oxide A .....

The formula if Black metallic oxide .....

The equivalent weight of metal M in B .....

Q. In an experiment, 1.50 g of pure copper (ll) oxide was reduced to pure metal by heating with pure carbon. In another experiment, 1.15 g of pure copper was treated with nitric acid and the product formed was heated strongly till no further change was observed. The mass of copper (ll) oxide so formed was found to be 1.40 g. The mass of pure metal in the first experiment and the law followed are respectively

Q. A metal oxide has the formula

X_{2} O_{3}

. It can be reduced by hydrogen to give free metal and water.

0.1596 g

of metal oxide requires

6 m g

of hydrogen for complete reduction. The atomic mass of metal in amu is

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