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How will you identify a colourless liqui...

How will you identify a colourless liquid as `H_(2)O_(2) or H_(2)`O?

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[X] + dil.H_(2)SO_(4) to [Y] , colourless suffocating gas [Y] + K_(2)Cr_(2)O_(7) + H_(2)SO_(4) to Green colouration of solution . Then [X] and [Y] are -

Identify the following reactions at disproportionation a comproportionations reactions- 2H_(2)O_(2)(l)to2H_(2)O(l)+O_(2)(g)

Explain why a solution of H_(2)O_(2) cannot be concentrated by distillation at atmospheric pressure. How will you get pure H_(2)O_(2) from its dilute solution?

Pure H_(2)O_(2) is________

The normality of '30 volume' of H_(2)O_(2) is-

Which are oxidised in the following reactions ? Give reasons . H_(2)O_(2)+O_(3)toH_(2)O+O_(2)

Compare the structures of H_(2)O and H_(2)O_(2) .

What do you understand by the expression '30 volume H_(2)O_(2) solution?

Calculate the enthalpy of formation of liquid ethyl alcohol from the following data. C_(2)H_(5)OH(l)+3O_(2)(g)to2CO_(2)(g)+3H_(2)O(l),DeltaH=-1368kJ C(s)+O_(2)(g)toCO_(2)(g),DeltaH=-393kJ H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaH=-287kJ .

CHHAYA PUBLICATION-HYDROGEN-WARM UP EXERCISE
  1. H(2)O(2) reacts with NaOH to give two types of salts - why? Write dow...

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  2. Explain why H(2)O(2) cannot liberate CO(2) by reducing carbonate or bi...

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  3. H(2)O(2) exhibits both oxidising and reducing properties. Explain why.

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  4. What do you mean by the 'antichlor' property of H(2)O(2)?

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  5. Give the mechanism of the bleaching action of H(2)O(2).

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  6. What are perhydrates? Give examples.

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  7. How is H(2)O(2) preserved in the laboratory?

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  8. It is better to preserve H(2)O(2) in a polythene bottle than in a glas...

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  9. Explain why H(2)O(2) is used to restore the original colour of oil-pai...

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  10. How will you identify a colourless liquid as H(2)O(2) or H(2)O?

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  11. What happens when H(2)O(2) is added to acidified KI solution followed ...

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  12. What is perhydrol?

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  13. What is Fenton's reagent? Mention its use.

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  14. Give the name and structure of the compound used as brightener in wash...

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  15. Mention the role of H(2)O(2) in pollution control.

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  16. What do you understand by the expression '30 volume H(2)O(2) solution?

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  17. What do you mean by 20% H(2)O(2) solution?

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  18. Calculate the volume strength of 1% H(2)O(2) solution.

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  19. Determine the volume strength of 1(N) H(2)O(2).

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  20. Calculate the percentage strength of '6.588 volume H(2)O(2) '.

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