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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 13 & 14)Practice

When metal 'M' is treated with NaOH, a white gelatinous precipitate 'X' is obtained, which is soluble in excess of NaOH. Compound 'X' when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal 'M' is

Options

  1. AFe
  2. BZn
  3. CCa
  4. DAl

Correct answer

D. Al

Step-by-step solution

2 A l + 6 H 2 O → 2 A l O H 3 ↓ + 3 H 2 Al OH 3 + NaOH → Na OH 4   soluble

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