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A reddish pink substance on heating give...

A reddish pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. It on cooling, water is added to the residue then, it turns to its original colour. The substance is:

A

Iodine crystals

B

Copper sulphate crystals

C

Cobalt chloride crystals

D

Zine oxide

Text Solution

Verified by Experts

The correct Answer is:
c
It is a preperty of `CoCI_(2)`
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CENGAGE CHEMISTRY ENGLISH-QUALITATIVE INORGANIC SALT ANALYSIS-Exercises (Single Correct) Part-C (Analysis Of Cations)
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  9. In qualitative inorganic analysis of basic radicals hydrochloric acid ...

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  13. The product of reaction of an aq solution of Bi^(3+) salt with sodium...

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  14. Number of protons in Sodium and Sodium ion are same. True or False

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  18. A colourless (X) is soluble in water and also in alcohol and amies...

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  19. Salt mixture overset(dil. HCI) to Salt is consisting of cation

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