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Which one of the following cations will ...

Which one of the following cations will give a green coloured ash when a piece of filter paper dipped in a solution containing its salt and `Co(NO_(3))_(2)` is burned?

A

`Cu^(2+)`

B

`Mg^(2+)`

C

`AI^(3+)`

D

`Zn^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
D
`CoO.ZnO` (Rinmann's gree)
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GRB PUBLICATION-SALT ANALYSIS-B. Dry Tests/Colour/Solubility/Heating Effects
  1. A brick red colour is imparted to Bunsen flame by a :

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  2. Which one of the following metal salts produced a blue coloured bead i...

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  3. Which one of the following cations will give a green coloured ash when...

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  4. What products are expected from the desproprtionation reactin of hypoc...

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  5. What is the colour of K^(+) through cobalt/double blue glass?

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  6. In the borax test of Co^(2+) , the blue colour of bead is due to the f...

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  7. Which of the following is not a preliminary test used to detect ions?

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  8. When copper nitrate is strongly heated, it is converted into

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  9. A chloride dissolves appreciably in cold water. When placed on platinu...

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  10. Which of the following does not give metal oxide on heating?

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  11. Which of the following metal bicarbonate will give metal oxide and CO(...

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  12. Which of the following metal nitrate will give metal and oxygen on hea...

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  13. Which of the following nitrate will give N(2)O on heating?

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  14. Which of the following ammonium salt will not give acid on heating?

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  15. Which of the following halide will not give halogen gas on heating?

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  16. Select the correct statements:

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  17. Which of the following metal sulphate will give SO(2) and SO(3) both g...

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  18. Dead burnt plaster is

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  19. When NaH(2)PO(4) is heated then which of the following compound is for...

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  20. When KMnO(4) is heated then which of the following compound is formed?

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