`KO_(2)` is-

A

Normal oxide

B

Super oxide

C

Suboxide

D

Peroxide

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The correct Answer is:
B
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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) ?

The oxidation state of K and O in KO_(2) respectively are

What is the oxidation state of K in KO_(2) ?

What is magnetic character of anion of KO_(2) ?

MARVEL PUBLICATION-S BLOCK ELEMENTS -TEST YOUR GRASP
  1. KO(2) is-

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  2. Which of the following sets of atomic numbers is of the alkali metals ...

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  3. The elements of group 1 are called alkali metals because

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  4. Chill salt petre is

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  5. Which of the following is sparingly soluble in water ?

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  6. Which of the following statement is incorrect ? a)Oxide of aluminium ...

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  7. Pick out statement (s) which is/are not true about diagonal relationsh...

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  8. Which one is the highest melting halide ?

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  9. "Electron" is an alloy of

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  10. Sodium burns in dry air to give

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  11. Select odd pair of name of chemical and its chemical composition.

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  12. The raw materials required for the manufacture of Na(2)CO(3) by Solva...

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  13. The carbonate that will not decompose on heating is

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  14. The alkali metal used in photoelectric cell is

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  15. Which of the following if good source of potassium ?

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  16. The first ionization enthalpy of magnesium is lower than the first ion...

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  17. Which of the following feact only with boiling water ?

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  18. Mg burns in air to give

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  19. Beryllium and aluminium exhibit many properties which are similar . Bu...

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  20. Which of the following is not a compound of calcium ?

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  21. Mark the compound which does not contain calcium carbonate ?

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