AIPMT PRELIMS2011Chemistry-Qualitative Analysis
AIPMT PRELIMS 2011 Chemistry Detection of Elements MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The Lassaigne's extract is boiled with conc. HNO₃ while testing for halogens. By doing so it.
A
Increase the concentration of NO₃⁻ ions
B
Decomposes Na₂S and NaCN, if formed
C
Helps in the precipitation of AgCl
D
Increases the solubility product of AgCl
Correct Answer
Option B
Detailed Explanation
Boiling the Lassaigne's extract with concentrated HNO₃ decomposes any Na₂S and NaCN that might be present, preventing interference in the test for halogens.
Found an issue with this question?