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Bromine vapours will turn moist starch i...

Bromine vapours will turn moist starch iodide paper

A

Brown

B

Red

C

Blue

D

Colourless

Text Solution

Verified by Experts

The correct Answer is:
C
Blue, because of presence of iodine in starch iodide. `Br_2` will displace `I_2` from starch iodide turning paper blue.
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Salt + H_(2)SO_(4) (dilute) to Coloured vapours which turns starch iodide paper blue.Identify the acid radical and the coloured vapours giving the relevant chemical equations.

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A sodium salt (A) is heated with cone. Sulphuric acid. The evolved gas truns moist litmus paper red and producess white fumes in contact with a glass rod moistened with ammonia solution. It also gives white precipitate when passed through AgNO_(3) solution. When the salt is heated with MnO_(2) and cone. H_(2)SO_(4) , a gas with an irritating smell is evolved which turns starch-iodide paper blue. Identify the salt and the gaseous product evolved from it. Explain your answer with relevant chemical equations.

MARVEL PUBLICATION-P-BLOCK ELEMENTS -TEST YOUR GRASP
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