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A salt (A) when heated with K2 Cr2 O7 an...

A salt (A) when heated with `K_2 Cr_2 O_7` and conc. `H_2 SO_4` liberates a gas which is absorbed in NaOH solution. The NaOll solution turns yellow. When this solution is acidified with acetic acid and lead acetate solution is added, a yellow precipitate (B) is formed. (A) is mixed with `MnO_2` and heated with conc. `H_2 SO_4` when a gas (C) is evolved which tums starch-iodide paper blue.
The compound formed, which turns NaOH solution yellow, is:

A

`Na_2 Cr_2 O_7`

B

`Na_2 S`

C

` Nal`

D

`Na_2 CrO_4`

Text Solution

Verified by Experts

The correct Answer is:
D
`Na_2 CrO_4`
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A salt (A) when heated with K_2 Cr_2 O_7 and conc. H_2 SO_4 liberates a gas which is absorbed in NaOH solution. The NaOll solution turns yellow. When this solution is acidified with acetic acid and lead acetate solution is added, a yellow precipitate (B) is formed. The acid radical present in the salt is

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