SolveItClass 10 · NCERT

NCERT Solutions · Class 10 Science Metals and Non-metals

16 questions · 16 still being checked

EXERCISES 11–16 (part 2 of 2)

  1. Exercise 11

    What type of oxides are formed when non-metals combine with oxygen?

    Solution being prepared

  2. Exercise 12

    Give reasons
    (a)
    Platinum, gold and silver are used to make jewellery.
    (b)
    Sodium, potassium and lithium are stored under oil.
    (c)
    Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
    (d)
    Carbonate and sulphide ores are usually converted into Collection of gas oxides during the process of extraction.

    Solution being prepared

  3. Exercise 13

    You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.

    Solution being prepared

  4. Exercise 14

    Differentiate between metal and non-metal on the basis of their chemical properties.

    Solution being prepared

  5. Exercise 15

    A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?

    Solution being prepared

  6. Exercise 16

    Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

    Solution being prepared