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30g Mg and 30g O(2) are reacted and the ...

30g Mg and 30g `O_(2)` are reacted and the residual mixture contains:

A

60g of MgO only

B

40g of MgO and 20g of `O_2`

C

45g of MgO and 15g of `O_2`

D

50g of MgO and 10g of `O_2`

Text Solution

Verified by Experts

The correct Answer is:
D
`underset(2xx24g)2Mg+O_2tounderset(32g)2MgO`
`48g " "Mg-=32gO_2`
`30g" "Mg-=(32)/(48)xx30gO_2=20g" "O_2`
Therefore, reaction mixture contains 10g of unreacted `O_2` and 50g of MgO(30g Mg will react will 20g of `O_2` to give 50g of MgO)
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DINESH PUBLICATION-ALKALI EARTH METALS-Revision Questions From Competitive Exams.
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  2. Bleaching action of Bleaching powder is due to the liberation of

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  3. 30g Mg and 30g O(2) are reacted and the residual mixture contains:

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  4. Which of the following salt will give a green colour in fire works?

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  5. Bleaching powder is obtained by the interaction of Cl2 and

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  6. Carnallite on electrolysis gives

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  7. The solubilities of carbonates decreases down the magnesium group due ...

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  8. The substance not likely to contain CaCO(3) is:

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  9. Serveral blocks of magnesium are fixed to the bottom of a ship to

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  10. In curing cement plasters, water is sprinkled from time to time. This ...

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  11. The correct order of solubility of the sulphates of alkaline earth met...

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  12. The product obtained on fusion of BaSO(4) and Na(2)CO(3) is

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  13. Dead burnt plaster is

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  14. Which of the following is not an ore of magnesium?

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  15. Pick out statement (s) which is/are not true about diagonal relationsh...

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  16. Which of the following exists in polymeric form

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  17. Dead burnt plaster is

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  18. A solid compound 'X' on heating gives CO(2) gas and a residue. The res...

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  19. When calcium carbide is heated in atmosphere of nitrogen in an electri...

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  20. Which pair of the following chlorides does not impart color to the fla...

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