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Which of the following is incorrect for ...

Which of the following is incorrect for quick lime ?

A

Pure CaO is a crystalline white solid of very high melting point.

B

On heating with ammonium salts, it liberates `NH_(3)` gas.

C

It forms calcium carbide when heated with coke in an electric furnace at 2273 K.

D

It combines with acids and with solid acidic oxides at high temperature to form salts.

Text Solution

Verified by Experts

The correct Answer is:
A
it is a white amorphous solid usually obtained in the form of hard lumps.
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R SHARMA-THE S BLOCK ELEMENTS-Follow-up Test 11
  1. Calcium oxide is called quick lime. It is prepared by the thermal deco...

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  2. Quick lime is prepared on a commercial scale by heating in a rotary k...

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  3. Which of the following is incorrect for quick lime ?

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  4. The addition of limited amount of water disintegrates the hard lumps o...

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  5. Soda lime is a mixture of

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  6. Lime is used for

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  7. Calcium hydroxide is called slaked lime. It is prepared on a commercia...

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  8. Which of the following is incorrect for slaked lime ?

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  9. A suspension of slaked lime in water is called

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  10. Bleaching powder is prepared by passing chlorine into

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  11. Which of the following changes occur when an excess of CO(2)(g) is pas...

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  12. Limestone rock is the commonest form of calcium carbonate which also o...

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  13. Calcium carbonate, commonly called limestone, is prepared by passing C...

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  14. Which of the following in incorrect for CaCO(3) ?

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  15. Calcium carbonate along with is used as a flux in the extraction of m...

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  16. Calcium carbonate is used as (i) a filler in cosmetics (ii) a cons...

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  17. Plaseter of Paris, a white powder, is

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  18. Plaster of Paris is obtained when gypsum is heated to

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  19. Plaster of Paris has a remarkable property of setting with water. On m...

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  20. The raw materials for the manufacture of Portland cement (or just ceme...

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