PASSAGE 10 A chemist opened a cupboard to find four bottles containing water solutions
CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
PASSAGE 10 A chemist opened a cupboard to find four bottles containing water solutions, each of which has lost its label. Bottles 1, 2, 3 contained colourless solutions, whilst Bottle 4 contained a blue solution. The labels from the bottles were lying scattered on the floor of the cupboard. They were copper(II) sulphate sodium carbonate lead nitrate hydrochloric acid By mixing samples of the contents of the bottles, in pairs, the chemist made the following observations:| (i) | Bottle 1 + Bottle 2 | white precipitate |
| (ii) | Bottle 1 + Bottle 3 | white precipitate |
| (iii) | Bottle 1 + Bottle 4 | white precipitate |
| (iv) | Bottle 2 + bottle 3 | colourless gas evolved |
| (v) | Bottle 2 + Bottle 4 | no visible reaction |
| (vi) | bottle 3 + Bottle 4 | blue precipitate |