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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 F F F

B

T T F F

C

T F T T

D

T T T F

Text Solution

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The correct Answer is:
A
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NARAYNA-S-BLOCK ELEMENTS-Level V-(ONLY ONE ANSWER CORRECT )
  1. Alkali metals give coloue in Bunsen flame due to :

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

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  3. Select the incorrect statement :

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

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

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  6. Sodium burns in dry air to give :

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  7. Alkali metals are characterised by

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

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

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

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  11. Solution of K(2)O in water in basic, because it contains a significant...

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  12. Which of the following oxides is formed when potassium metal is burnt ...

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  13. On commercial scale, sodium hydroxide is prepared by :

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  14. Which of the following gives sodium hydroxide along with hydrogen gas ...

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  15. Sodium when heated in air at 350^(@)C forms compound X.X obsorbs CO(2)...

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  16. When ionic nitrides react with water, the products are :

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  17. Low solubility of CsI in water is due to :

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  18. Select the correct statement.

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  19. NaNO(3) is not used as gun powder because it is

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  20. A doctor by mistake administers a Ba(NO(3))(2) solution to a patient f...

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