Question

true or false
3. Steam at 100°C causes more severe burns
than water at 100°C.
4. The temperature at which a liquid changes
into gaseous state without any rise in
temperature is called liquefaction point.
5. A vapour is a gaseous state of a liquid below
its boiling point​

Answer 1

Answer:

3) TRUE

4) TRUE

5) FALSE

Explanation:

Hope this helps!

Answer 2

True or False:

3.Steam at 100°C causes more severe burns than water at 100°C - True.

• Reason : Steam will produce more severe burns than boiling of water because steam has more heat energy than water due to its latent heat of vaporisation and additionally latent heat of condensation. Steam and boiling water can exist at varing temperature but it is only correct to assume here that both are at same temperature.

4.The temperature at which a liquid changes into gaseous state without any rise in temperature is called liquefaction temperature. - False.

• Reason: The temperature at which liquid changes to gaseous state is called Boiling point.

5.A vapour is a gaseous state of a liquid below its boiling point - True.

• Reason: Liquid vaporises first before boiling.

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