The boiling point of pure water is:

Important Questions on The Matter in Our Surroundings

EASY

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 6

The freezing point of pure water is:

EASY

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 7

The substance which does not sublime on heating is:

MEDIUM

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 8

The rate of evaporation does not increase with:

EASY

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 9

Water changes into ice at $0 \mathrm{℃}$, by giving out heat energy. The heat energy so given out is called: 

EASY

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 10

Water at $373 \mathrm{K}$ change to steam at $373 \mathrm{K}$ by absorbing heat energy. The heat energy so absorbed is called _____. 

MEDIUM

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 11

A solid changes into a liquid at its melting point by absorbing heat energy, but the temperature does not rise. Which of the following statement is incorrect?

MEDIUM

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 12

Which of the following is an incorrect statement?
When steam at $100 °\mathrm{C}$ is allowed to cool, it gives out heat energy to form water at $100 °\mathrm{C}$. The loss of heat energy

EASY

9th CBSE

IMPORTANT

Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 13

During the liquefaction of air: