67th B.P.S.C. (Re-Exam) (Pre) 2022
Consider the following statements : 1. The Addition of salt to pure water increases the boiling point of water and decreases the freezing point of water. 2. When methyl alcohol is added to water, boiling point of water decreases. Which of the above statements is/are correct?
aSalt and methyl alcohol are same in behavior
b1 only
c2 only
dBoth 1 and 2✓ Correct
eNone of the above/More than one of the above
Explanation
Dissolving salt in pure water increases the boiling point and decreases the freezing point of water. Also, when methyl alcohol (methanol) is added to water, the boiling point decreases. This happens due to weakening of hydrogen bonding.
general-science