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Standard XII
Chemistry
Question

A white solid is soluble in hot water but almost insoluble in cold water. When potassium chromate is added to its hot solution a yellow precipitate is obtained. The original solid is:
  1. silver chloride
  2. potassium nitrate
  3. lead chloride
  4. barium sulphate

A
silver chloride
B
lead chloride
C
potassium nitrate
D
barium sulphate
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Solution
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Lead chloride is a white solid is soluble in hot water but almost insoluble in cold water.
Lead chloride reacts with potassium chromate to form Lead chromate and potassium chloride. potassium chromate is a yellow color precipitate.
PbCl2+K2CrO4→PbCrO4+KCl

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