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When potassium dichromate crystals are h...

When potassium dichromate crystals are heated with concentrated sulphuric acid, we get :

A

Oxygen

B

Hydrogen

C

Sulphur dioxide

D

Hydrogen sulphide.

Text Solution

Verified by Experts

The correct Answer is:
A

`2K_(2)Cr_(2)O_(7) + 8H_(2)SO_(4) to 2K_(2)SO_(4) + 2Cr_(2)(SO_(4))_(3) + 8H_(2)O + 3O_(2)`
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MODERN PUBLICATION-CHEMISTRY OF D-AND F-BLOCK ELEMENTS-Multiple Choice Questions (Level -I) Transition metal compounds and their Characteristics
  1. Fe^(2+) and Fe^(3+) can be distinguished by :

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  2. The equivalent weight of MnSO(4) is half of its molecular weight when ...

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  3. When potassium dichromate crystals are heated with concentrated sulphu...

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  4. Acidified potassium dichromate is treated with hydrogen sulphide, IN t...

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  5. The oxidation states of Mn in K(2)MnO(4), KMnO(4) and Mn(2)O(7) are re...

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  6. In Cr(2)O(7)^(2-) :

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  7. In a redox reaction, how many moles of electrons are accepted by 1 mol...

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  8. Cr(2)O(3) dissolves in aqueous NaOH in the presence of an oxidant to f...

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  9. Passivity of iron is due to the formation of a thin layer of :

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  10. Two fo the constituents of German silver are :

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  11. The compound which gives off oxygen on moderate heating is :

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  12. Nessler's reagent is :

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  13. The black oxide of copper (CuO) in attacked by moisture and carbon dio...

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  14. FeCl(3) has each of the following characteristics except :

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  15. Thomas slag is :

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  16. Blister copper is :

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  17. Iron is obtained on a large scale by reduction of Fe(2)O3 with :

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  18. Which of the following ions exist as dimer ?

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  19. Kl and CuSO(4) solutions when mixed give :

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  20. Ammonium dichromate is used in fireworks. The green coloured blown in ...

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