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    Chemistry
    Grade-10
    Easy

    Question

    Metal hydroxide (+ heat) → ____________ + _________

    1. Metal carbonate + water
    2. Metal oxide + carbon dioxide
    3. Carbon dioxide + water
    4. Metal oxide + water

    hintHint:

    Metal hydroxides are strong bases, and metal hydroxide contains hydroxide ions and ions of the specific metal. On heating, metal hydroxides yield metals oxides and the side product obtained will be water.

    The correct answer is: Metal oxide + water

      Metal hydroxide when heated decomposes to form metal oxide + water.
      • When we heat Metal hydroxide, Metal hydroxide decomposes to form a metal oxide and water. 
      • On heating, metal hydroxides break down into metal oxides and water.
      • For example, Water and sodium oxide are produced during the breakdown of sodium hydroxide.
      • When heated, metal hydroxide breaks down into metal oxide and water as a byproduct.
      • Since, we are aware that the thermal breakdown of metal hydroxides is another name for the effect of heat on metal hydroxides.

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