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Question

A imparts green color to the flame. Its solution does not give a precipitate on passing H2S. When it is heated with solid K2Cr2O7 and conc. H2SO4, reddish brown gas is evolved. The gas when passed in an aqueous solution of NaOH turns it yellow. Find out A.

A
HgCl2
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B
BaCl2
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C
Both (A) and (B)
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D
None of the above
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Solution

The correct option is B BaCl2

Ba2+ ions imparts green color to the flame. Its solution does not give a precipitate on passing H2S.

When it is heated with solid K2Cr2O7 and conc. H2SO4, it gives CrO2Cl2 reddish brown gas is evolved.

The gas, when passed in an aqueous solution of NaOH, turns yellow.

Option B is correct.

368301_214739_ans_8b76cb5de80e4a518523465a816fd052.PNG

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