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A test tube containing a nitrate and ano...

A test tube containing a nitrate and another containing a bromide and `MnO_(2)` are treated with concentrated `H_(2)SO_(4)`. The reddish brown fumes evolved are passed through water. The water will be coloured by :

A

the nitrate

B

the bromide

C

both

D

none of the two

Text Solution

Verified by Experts

The correct Answer is:
B
`NO_(3)^(-)` gives `NO_(2)` with concentrated `H_(2)SO_(4)` which on passing through water form colourless `HNO_(3)`(l) and `HNO_(2)(l). Br^(-) + MnO_(2)` on heating with concentrated `H_(2)SO_(4)` gives `Br_(2)` gas which on passing through water imparts it a reddish brown colour.
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Knowledge Check

  • When Kbr is treated with concentrated H_(2)SO_(4) reddich brown gas evolved, gas is

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