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Potassium superoxide (KO(2)) is used in ...

Potassium superoxide `(KO_(2))` is used in space capsuled, submarined, and breathing masks, because it is

A

diamagnetic in nature

B

high melting compound

C

helpful in removing `CO_(2)` and producing `O_(2)`

D

unstable compound.

Text Solution

Verified by Experts

The correct Answer is:
C
`KO_(2)` reacts with `CO_(2)` liberating `O_(2)`
`4KO_(2)+2CO_(2) rarr 2K_(2)CO_(3)+2O_(2)`
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KO_(2) ( potassium super oxide ) is used in space and submarines because it :

Potassium superoxide KO_(2) , is utillised in closed system breathing apparatus. Exhaled air contains CO_(2) and H_(2)O , both of which are removed and the removal of water generates oxygen for breathing by the reaction 4KO_(2(s))+2H_(2)O_((l))rarr 3O_(2(g))+ 4KOH_((s)) The potassium hydroxide removes CO_(2) from the apparatus by the reaction: KOH_((s))+CO_(2(g))rarr KHCO_(3(s)) (a) What mass of KO_(2) generates 20 gm of oxygen? (b) What mass of CO_(2) can br removed from the apparatus by CO_(2) can be removed from the apparatus by 100gm of KO_(2) ?

KO_(2) is used in oxygen cylinders in space and submarines because it

A2Z-S BLOCK ELEMENTS ( GROUP 13 - 14)-Section D - Chapter End Test
  1. Potassium superoxide (KO(2)) is used in space capsuled, submarined, an...

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  2. Plaster of Paris hardens by

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  3. The mixture of MgCl(2) and MgO is called .

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  4. Which monoxide of alkali metals is slowly hydrolysed ?

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  5. Which of the following has lowest thermal stability ?

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

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  7. The order of melting point of chloirdes of alkali metals is :

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  8. Sodium carbonate reacts with SO(2) in aqueous medium to give

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  9. Sodium dichormate on heating with coke yields :

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  10. Which one out of the NaOH and KOH is a better absorber of CO(2) ?

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  11. Reduction of sodium nitrite by sodium metal yields:

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  12. Which of the following statement is incorrect ?

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  13. What products are formed during the electrolysis of a of a concentrat...

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  14. Na+Al(2)O(3) overset("High temp.") rarrXoverset(CO(2)" in")underset("w...

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  15. What happens when a mixture of sodium sulphate, lime stone and coke is...

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  16. The order of basicity of hydroxides of alkali metals is

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  17. What happens when sodium metal is heated to a temperature 350^(@)C in ...

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  18. Solubility of an ionic compound in water is mainly dependent on: a...

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  19. Na(2)Be(OH)(4)] is formed when

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  20. What is the formula of basic anhydride of Ba(OH)(2)?

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  21. What is the correct order of thermal stability of carbonates of alkali...

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