Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-diagram based-Easy-Class 12
A test tube contains a salt being heated with concentrated H₂SO₄ and copper turnings. Brown fumes are evolved, and the solution turns blue. What does this indicate about the ions present in the salt?
A
Presence of nitrate ions
B
Presence of chloride ions
C
Presence of sulphate ions
D
Presence of carbonate ions
Correct Answer
Option A
Detailed Explanation
The evolution of brown fumes and the blue color of the solution indicates the presence of nitrate ions, as the reaction forms copper sulphate and nitrogen dioxide.
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