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A brown ring is formed in the ring test ...

A brown ring is formed in the ring test for `NO_3^-` ion. It is due to the formation of

A

`[Fe(H_2O)_5 (NO)]^(2+)`

B

`FeSO_4.NO_2`

C

`[Fe(H_2O)_4 (NO)_2]^(2+)`

D

`FeSO_4.HNO_3`

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MODERN PUBLICATION-p-BLOCK ELEMENTS-EXERCISE
  1. Complete the following statement- Sources of calcium are-

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  2. Which of the following statements is wrong?

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  3. A brown ring is formed in the ring test for NO3^- ion. It is due to th...

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  4. Elements of group-15 form compounds in +5 oxidation state. However, bi...

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  5. On heating ammonium dichromate and barium azide separately we get

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  6. In the preparation of HNO3, we get NO gas by catalytic oxidation of a...

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  7. The oxidation state of central atom in the anion of compound NaH2PO2 w...

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  8. Which of the following is not tetrahedral in shape?

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  9. Which of the following are peroxoacids of sulphur?

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  10. Hot concentrated sulphuric acid is a moderately strong oxidizing agent...

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  11. A black compound of manganese reacts with a halogen acid to give green...

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  12. In the preparation of compounds of Xe, Bartlett had taken O2^(+) PtF6^...

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  13. PCl5 in solid state exists as ionic compound having cation ..............

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  14. Reduction potentials of some ions are given below. Arrange them in de...

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  15. Which of the following is isoelectronic pair?

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  16. What happens when chlorine gas is passed through a hot concentrated so...

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  17. Complete the following statement- Vitamin A is important for our body ...

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  18. Which of the following is correct for P4 molecule of white phosphoru...

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  19. Which of the following statements are correct?

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  20. Which of the following has maximum number of unpaired d electrons :

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