WBJEE 2021 Physics and Chemistry Solved Paper

CHEMISTRY

CATEGORY - I (Q41 to Q70)

Carry 1 mark each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ¼ mark will be deducted.

Question : 57 of 80

Marks: +1, -0

solution is made by a concentrated solution of Co(NO3)2 with a concentrated solution of NaNO2 in 50% acetic acid.
A solution of a salt containing metal M is added to the mixture, when a yellow precipitate is formed. Metal ‘M’ is

Magnesium
Sodium
Potassium
Zinc

Validate

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