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A clock spring is heated to redness and ...

A clock spring is heated to redness and then plunged into cold water. This treatment will cause it to become

A

Soft and ductile

B

More springy than before

C

Strongly magnetic

D

Hard and brittle

Text Solution

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The correct Answer is:
D
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ERRORLESS -D & P-BLOCK ELEMENTS-Ordinary Thinking (Compounds of d & f block elements)
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  2. Stainless steel is non-corrosive. This character is more prominent in

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  3. When little vanadium is mixed with steel, it becomes

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  4. To obtain steel entirely free from sulphur and phosphorus, the process...

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  5. A clock spring is heated to redness and then plunged into cold water. ...

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  6. Mark the steel in which carbon % is highest

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  7. Mark the variety of iron which has highest melting point

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  8. In the extraction of zinc which gas is burnt in the jackets surroundin...

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  9. In the Bessemer and open-hearth process for the manufacture of steel, ...

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  10. About the basic open hearth process, which statement is wrong

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  11. Which of the following statements is wrong

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  12. Hot and conc. Nitric acid when reacts with copper, the gas obtained is

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  13. Paris green is

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  14. Which of the following metas displaces SO(2) gas from concentrated sul...

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  15. Orford process is used in extraction of

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  16. Horn silver is

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  17. The extraction of nickel involves

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  18. When phosphine is passed through aqueous solution of copper sulphate, ...

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  19. Assertion : The aqueous solution of FeCl(3) is basic in nature . Rea...

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  20. Assertion : AgC1 dissolves in NH(4) OH solution. Reason: Due to form...

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