Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 29

HARD

9th CBSE

IMPORTANT

Earn 100

Explain why, ice at $0 ° C$ is more effective in cooling than water at the same temperature.

Important Questions on Matter in Our Surroundings

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 30

Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it? Give reasons for your answer.

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 31

Why does steam cause more severe burns than boiling water?

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 32

Which contains more heat,

1 kg

of ice at

0 ° C

or

1 kg

of water at

0 ° C

? Give reason for your answer.

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 33

Which contains more heat,

1 kg

of water at

100 ° C

or

1 kg

of steam at

100 ° C

? Give reason for your answer.

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 34

Explain why steam at

100^{o} C

is better for heating purposes than boiling water at

100^{o} C

.

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 35

Which produces more severe burns: boiling water or steam? Why?

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 36

Why does the temperature of a substance remain constant during the change of state?

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 37

What is the physical state of water at $0 ° C$ ?