NextMockపరీక్షలు వెతకండి, ఉదా. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · ప్రశ్న 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
సమాధానం చూపించు & వివరణ

సమాధానం: (C) Both 1 and 2

వివరణ

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

  • (A) తప్పు

    Wrong: statement 2 is also correct.

  • (B) తప్పు

    Wrong: statement 1 is also correct.

  • (C) సరైనది

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

  • (D) తప్పు

    Wrong: they have opposite effects on boiling point.

  • (E) తప్పు

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