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1. | (i) Sodium hydroxide solution is added to zinc sulphate solution till it is in excess. | | | | |
2. | (ii) Chlorine water is exposed to sunlight. | | | | |
3. | (iii) Ammonia gas is bubbled through red litmus solution. | | | | |
4. | (iv) Barium chloride solution is added to dilute sulphuric acid. | | | | |
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