Question

You are provided with some compounds in the box.

Choose the most appropriate compound which fits the descriptions (a) to (c) given below:

1. A colourless gas which turns acidified K₂Cr₂O₇ from orange to green.
2. A yellow explosive oily liquid formed when excess chlorine gas reacts with ammonia gas.
3. A yellow metallic oxide formed on thermal decomposition of PbCO₃.

Answer 1

1. Sulphur dioxide (SO₂)
2. Nitrogen trichloride (NCl₃)
3. Lead monoxide (PbO)