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How is sodium chromate converted into so...

How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?

A

By the action of concentrated sulphuric acid

B

By roasting with soda ash

C

By the action of sodium hydroxide

D

By the action of limestone

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The correct Answer is:
A
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TARGET PUBLICATION-D AND F-BLOCK ELEMENT -COMPETITIVE THINKING
  1. Which of the following statements about the interstitial compounds is ...

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  2. The ore chromite is.

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

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  4. Potassium dichromate is a good oxidising agent in acidic medium the...

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  5. Which one of the following statement is correct when SO(2) is passed ...

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  6. The reaction of K2 Cr2 O7 with NaCl and conc. H2 SO4 gives.

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  7. KMnO(4) can be prepared from K(2)MnO(4) as per the reaction 3MnO(4)^...

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  8. Upon heating poatssium permanganate, which of the following compou...

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  9. KMnO(4) in basic medium is reduced to

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  10. The number of moles of KMnO(4) reduced by 1 "mol of" KI in alkaline me...

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  11. When KMnO(4) is reduced with oxalic acid in acidic solution, the oxida...

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  12. The reaction of aqueous KMnO4 with H2 O2 in acidic conditions gives.

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  13. Name the gas that can readily decolourise acidified KMnO(4) solution:

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  14. The colour and magnetic nature of mangante ion (MnO(4)^(2-)) is

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  15. Solution of MnO(4)^(-) is purple-coloured due to :

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  16. Potassium permanganate is used.

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  17. Which of the following is Baeyer's reagent ?

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  18. Lanthanoids are

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  19. The atomic number of Gadolinium (Gd) is 64. The CORRECT electronic con...

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  20. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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