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Question

Among statements I - IV, the correct ones are:

I. Decomposition of hydrogen peroxide gives dioxygen

II. Like hydrogen peroxide, compounds, such as KClO3, Pb(NO3)2 and NaNO3 when heated liberate dioxygen.

III. 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.

IV. Hydrogen peroxide is used for the manufacture of sodium perborate


A

I, II, III and IV

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B

I, II and III only

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C

I, III and IV only

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D

I and III only

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Solution

The correct option is A

I, II, III and IV


Explanation for the correct option:

(A) I, II, III and IV

  • Statement I: Decomposition of Hydrogen peroxide:
  • H2O22H2O+O2 So, from the reaction it can be observed that we can obtain dioxygen on the decomposition of Hydrogen peroxide.
  • Statement II: Heating of compounds KClO3 and PbNO32:
  • KClO3MnO2KCl+32O2
  • PbNO32PbO+2NO2+12O2 Here, it can be observed from the reaction that compounds like H2O2 also form dioxygen on heating.
  • Statement III: Industrial preparation of Hydrogen peroxide H2O2:
  • 2-ethylanthraquinolineH2/PdO2air2-ethylanthraquinoline+H2O2. From the reaction, it can be seen that 2-Ethylanthraquinone is useful in the industrial preparation of H2O2.
  • Statement IV: Manufacturing of sodium perborate:
  1. 2H3BO3+2NaOH+2H2O2Na2B2O2OH4+4H2OSodiumperborate It can be seen from the reaction that Sodium perborate can be synthesized by using Hydrogen peroxide.


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