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Which among the following statements is ...

Which among the following statements is incorrect for magnesium metal?

A

It burns in oxygen with a dazzling white flame

B

It reacts with cold water to form magnesium oxide and evolves hydrogen gas

C

It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas

D

It reacts with steam to form magnesium hydroxide and evolves hydrogen gas

Text Solution

Verified by Experts

The correct Answer is:
B

Magnesium metal does not react with cold water. 
Mg reacts with hot water and steam both, to give magnesium hydroxide and hydrogen.
`Mg(s)+H_(2)O(l)tounderset("Magnesium hydroxide")(Mg(OH)_(2))+H_(2)(g)uparrow`
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NCERT EXEMPLAR-METALS AND NON- METALS-Metals And Non- Metals
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  3. Which among the following statements is incorrect for magnesium metal?

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  4. Which among the following alloys contain mercury as one of its constit...

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  5. Reaction' between X and Y, forms compound Z. X loses electron and Y ga...

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  6. The electronic configurations of three elements X, Y and Z are X 2, 8,...

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  7. Although metals form basic oxides, which of the following metals form ...

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  8. Generally, non-metals are not conductors of electricity. Which of th...

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  9. Electrical wires have a coating of an insulating material. The materia...

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  10. Which of the following non-metals is a liquid?

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  11. Which of the following can undergo a chemical reaction?

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  12. Which one of the following Figures correctly describes the process of ...

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  13. Iqbal treated a lustrous, divalent element M with sodium hydroxide. He...

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  14. During extraction of metals, electrolytic refining is used to obtain p...

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  15. Why should the metal sulphides and carbonates be converted to metal ox...

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  16. Generally metals react with acids to give salt and hydrogen gas. Which...

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  17. Compound X and aluminium are used to join railway tracks. (a) Identify...

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  18. When a metal X is treated with cold water, it gives a basic salt Y Wit...

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  19. A non-metal X exists in two different forms Y and Z. Y is hardest natu...

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  20. The following reaction takes place when aluminium powder is heated wit...

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