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Which gas is usually liberated when an a...

Which gas is usually liberated when an acid reacts with a metal ? Illustrate with an example. How will you test for the presence of this gas ?

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Hydrogen gas is liberated.
Bring a burning match stick to it. `H_(2)` will burn explosively with pop sound.
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ZEN PUBLICATION-METALS AND NON METALS-ZEN ADDITIONAL QUESTIONS SECTION (VERY SHORT ANSWER [VSA] TYPE QUESTIONS)
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  2. In electrolytic refining of an impure coper metal, which substances ar...

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  3. What is galvanization?

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  4. Iron objects acquires redish brown coating when left exposed to moist ...

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  5. Why corrosion of iron is a serious problem?

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  6. Name the colour of coating formed on silver and copper articles expose...

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  7. Hydrogen is not a metal but it has been assigned a place in the metal ...

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  8. Why should the metal sulphides and carbonated ores be converted to met...

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  9. Name a non-metal which is lustrous and a metal which is non-lustrous.

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

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  11. Why does calcium float on water?

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  12. Which gas is usually liberated when an acid reacts with a metal ? Illu...

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  13. Name the metal which reacts with a very dilute HNO(3) to evolve hydrog...

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  14. Copper when exposed to air for a long time acquire a green coat . Why ...

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  15. Name of solvent in which electrovalent compounds are soluble and a sol...

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  16. Show the formation of MgCl(2) by the transfer of electrons in the two ...

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  17. What is the valency of silicon?

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  18. What is roasting in metallurgy?

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  19. Give reason: Chemical reaction does not take when copper is added to i...

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  20. Write the balanced chemical equation for the reaction taking place whe...

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