CSEC Chemistry · May/June 2005 · Paper 2 · Question 1(b)(i)

Y is a mixture of two salts. A student carries out tests on a sample of Y, with observations recorded in Table 1. You need to fill in the inferences.

Heat a small portion of solid Y in a test tube, gently at first and then strongly. Observations: colourless gas evolved with a choking odour; turns acidified potassium dichromate solution from orange to green. Inferences:

This question uses a figure or table from the paper — you'll see it when you practise.