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Consider the following statements, S(1...

Consider the following statements,
`S_(1) :` Alkali metals are never found in free state in nature.
`S_(2)` : The melting and boiling points of alkali metals are high.
`S_(3)` : The ceasium and potassium both are used as electrodes in photoelectric cells.
`S^(4)` :Alkali metals are normally kept in kerosene oil.
and arrange in the order of true/flase.

A

T T F F

B

T F T T

C

F F F T

D

T T F T

Text Solution

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The correct Answer is:
B
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NARAYNA-S-BLOCK ELEMENTS-Level V-(ONLY ONE ANSWER CORRECT )
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  2. Select the ciorrect statement with respect to alkali metals.

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  3. Consider the following statements, S(1) : Alkali metals are never fo...

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  4. Drying agent which reacts with CO2 and involves water vapour is

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  5. (X) reacts with sulphur dioxide in aqueous medium to give NaHSO(3), (X...

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  6. Acidified solution f sodium thiosulphate are unstable because:

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  7. The products obtained on heating LiNO(3) will be

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  8. Which of the following on thermal decomposition yields a basic as wel ...

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  9. The hottest region of Bunsen flame shown in the figure given below is

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  10. Which of the following increases in magnitude as the atomic number of ...

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  11. Alkali metals give coloue in Bunsen flame due to :

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  12. Which of the following about solution lf alkali metals in lioquid ammo...

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  13. Select the incorrect statement :

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  14. Consider the following statements, S(1) : Alkali metals are never fo...

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  15. Which of the following has the highest reactivity towards water?

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  16. Sodium burns in dry air to give :

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  17. Alkali metals are characterised by

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  18. In view of their low ionisation energies, the alkali metals are

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  19. Carbon can be oxidised to C(2) while heating its powder with :

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  20. What happens when sodium metal is heated in axcess of dry air containi...

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