Question

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13. A metal forms two oxides. The higher oxide
contains 80% metal. 0.72 g of the lower oxide gave
0.8 g of higher oxide when oxidised. Then the ratio
of the weight of oxygen that combines with the
fixed weight of the metal in the two oxides will be
(1) 2:3
(2) 1:2
(3) 4:5
(4) 3:2
​

Answer 1

Answer:

1:2

Explanation:

Higher oxide contain 80 percent of metal in 0.80g of metal oxide so

80/100×0.80= 0.64g of oxide which is same in both

So 0.80-0.64(higher oxide)

0.72-0.64(lower oxide)

So ratio of higher oxide and lower oxide is 2:1