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

BPSC – Combined Competitive Examination · ಪ್ರಶ್ನೆ 100

Consider the following statements: 1. Dissolving salt in pure water raises its boiling point and lowers its freezing point. 2. Adding methyl alcohol to water lowers the boiling point of water. Which of the above is/are correct?

  1. 1 only
  2. 2 only
  3. Both 1 and 2
  4. Salt and methyl alcohol behave the same way
  5. None of the above / More than one of the above
ಉತ್ತರ ತೋರಿಸು ಮತ್ತು ವಿವರಣೆ

ಉತ್ತರ: (C) Both 1 and 2

ವಿವರಣೆ

Non-volatile solutes raise boiling point (colligative property); a more volatile liquid like methanol lowers it.

  • (A) ತಪ್ಪು

    Wrong: statement 2 is also correct.

  • (B) ತಪ್ಪು

    Wrong: statement 1 is also correct.

  • (C) ಸರಿ

    Correct: salt (non-volatile) elevates BP and depresses FP; volatile methanol lowers the mixture's BP.

  • (D) ತಪ್ಪು

    Wrong: they have opposite effects on boiling point.

  • (E) ತಪ್ಪು

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