NextMockપરીક્ષાઓ શોધો, દા.ત. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · પ્રશ્ન 94

The metallurgical process in which the metal is obtained in a molten (fused) state is called:

  1. Roasting
  2. Calcination
  3. Froth flotation
  4. Smelting
  5. None of the above / More than one of the above
જવાબ બતાવો અને સમજૂતી

જવાબ: (D) Smelting

સમજૂતી

In smelting (e.g. iron in a blast furnace), the metal is reduced and collected in molten form.

  • (A) ખોટો

    Wrong: heating ore in air below melting point.

  • (B) ખોટો

    Wrong: heating in limited/no air to remove volatiles.

  • (C) ખોટો

    Wrong: a concentration method for sulphide ores.

  • (D) સાચો

    Correct: smelting reduces the ore at high temperature, giving molten metal.

  • (E) ખોટો

    Wrong: only one of the options A–D is correct.