NextMockಪರೀಕ್ಷೆಗಳನ್ನು ಹುಡುಕಿ, ಉದಾ. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · ಪ್ರಶ್ನೆ 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
ಉತ್ತರ ತೋರಿಸು ಮತ್ತು ವಿವರಣೆ

ಉತ್ತರ: (D) Smelting

ವಿವರಣೆ

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

  • (A) ತಪ್ಪು

    Wrong: heating ore in air below melting point.

  • (B) ತಪ್ಪು

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

  • (C) ತಪ್ಪು

    Wrong: a concentration method for sulphide ores.

  • (D) ಸರಿ

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

  • (E) ತಪ್ಪು

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