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JEE Main levelSingle correct optionDifficulty 2 of 3pb156

Acidifying an aqueous solution of sodium silicate (water glass) with HCl gives a gelatinous precipitate of

  1. A
  2. Bsilicic acid, which on drying gives silica gel
  3. C
  4. Dsilicon metal

Answer: B

. The hydrated silica, when dried, is silica gel, used as a drying agent and adsorbent.
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