Name :
(a) a chloride which is insoluble in cold water but dissolves in hot water,
(b) a chloride which is insoluble,
(c) two sulphates which are insoluble.

Explanation

### Step-by-Step Solution:

1. **Identify a chloride that is insoluble in cold water but dissolves in hot water.**
- The chloride that meets this criterion is **Lead(II) chloride (PbCl2)**. Lead chloride is known to be insoluble in cold water but dissolves when the water is heated.

2. **Identify a chloride that is insoluble.**
- The chloride that is insoluble is **Silver chloride (AgCl)**. Silver chloride does not dissolve in water, making it a classic example of an insoluble chloride.

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