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The orange solid on heating gives a colo...

The orange solid on heating gives a colourless gas and a greensolid which can be reduced to metal by aluminium powder. The orange and the green solids are respectively

A

`(NH_4)_2 Cr_2O_7 and Cr_2O_3`

B

`Na_2Cr_2O_7 and Cr_2O_3`

C

`K_2Cr_2O_7 and CrO_3`

D

`(NH_4)_2 Cr_2O_4 and CrO_3`

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The correct Answer is:
A
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ERRORLESS-THE d-AND f- BLOCK ELEMENTS -NCERT BASED QUESTIONS (Compounds of Transitional Elements)
  1. When acidified K(2)Cr(2)O(7) solution is added to Sn^(2+) salts then S...

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  2. In the reduction of dichromate by Fe(II), the number of electrons invo...

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  3. The orange solid on heating gives a colourless gas and a greensolid wh...

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  4. The bonds present in the structure of dichromate ion are

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  5. The reddish brown gas produced by heating KCl with solid K2Cr2O7 and...

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  6. When H(2)O(2) is shaken with an acidified solution of K(2)Cr(2)O(7) in...

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  7. How is sodium chromate converted into sodium dichromate in the manufac...

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  8. Which of the following gases turns the acdified potassium dischromate ...

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  9. Which of the following is formed when CO(2) gas is passed through an a...

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  10. Acidified solution of chromic acid on treatment with hydrogen peroxide...

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  11. In aqueous solution Cr^(2+) is stronger reducing agent than Fe^(2+). T...

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  12. The correct order of increasing oxidising power in the series is

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  13. The correct formula of permaganic acid is

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  14. Why Mn^(2+) compounds are more stable than Fe^(2+) compounds towards o...

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  15. Potassium permanganate acts as an oxidant in neutral, alkaline as well...

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  16. Which of the oxide of manganese is amohoteric

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  17. MnO(4)^(-) reacts with Br^(-) in alkaline pH to give

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  18. Which of the following statement is incorrect for KMnO4

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  19. Mn^(2+) can be converted into Mn^(7+) by reacting with

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  20. Formula of thiosulphate, manganate and arsenate respectively are

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