← Chemistry (4CH1)
Q1 / 5
Tests for ions and gases
Foundation
2 marks
What is the test for chloride ions (Cl⁻)?
A
Add HNO₃ (acidify), then AgNO₃ → white AgCl precipitate; soluble in dilute NH₃
B
Add NaOH → blue precipitate confirms Cl⁻
C
Add HCl → fizzing confirms Cl⁻
D
Add litmus — Cl⁻ turns litmus red
Need a hint?
Tests for ions and gases — Chemistry (4CH1) | Smartzi