Chemistry · May / June 2024 · Paper 62 · Question 3
0620
As printed in the paper
The question as text
A student tests two substances: solid H and solution I. Tests on solid H Solid H is barium carbonate. Complete the expected observations.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
3(a)(i)[2]
limewater turns milky (when gas passed through it)and any one from
effervescence / fizzing / bubblessolid disappears / dissolves3(a)(ii)[1]
carbon dioxide / CO2
3(b)[1]
(pale / light) green (flame)
3(c)[1]
(solution becomes) pink / pale purple / lilac
3(d)[1]
white precipitate
3(e)[1]
no change
3(f)(i)[1]
ammonia / NH3
3(f)(ii)[1]
no change / stays blue
3(g)[2]
ammonium chloride / NH4Cl
M1 ammonium / NH4+
M2 chloride / Cl–
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.