Which of the following could be placed in a glass tumbler before pouring hot milk into it to reduce the chances of the tumbler cracking due to the heat?

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Important Questions on Heat

HARD

7th CBSE

IMPORTANT

THINK ABOVE AND BEYOND SCIENCE PRACTICE BOOKS>Chapter 4 - Heat>Exercise>Q 14

A wet cloth was placed on a balance and left for several days. The change in its mass is shown in the graph below: What was the mass of water in the cloth at the start of the experiment?

HARD

7th CBSE

IMPORTANT

THINK ABOVE AND BEYOND SCIENCE PRACTICE BOOKS>Chapter 4 - Heat>Exercise>Q 15

The table below gives the melting and boiling points of a few metals.

Name of the metal	Melting point $(° C)$	Boiling point $(° C)$
Silver	$962$	$2212$
Tin	$232$	$2270$
Gold	$1062$	$2807$
Aluminium	$660$	$2467$
Tungsten	$3410$	$6170$
Lead	$328$	$1740$

Which of these metals remains a liquid over the widest range of temperature?

HARD

7th CBSE

IMPORTANT

THINK ABOVE AND BEYOND SCIENCE PRACTICE BOOKS>Chapter 4 - Heat>Exercise>Q 16

The table below gives the melting and boiling points of a few metals.

Name of the metal	Melting point $(° C)$	Boiling point $(° C)$
Silver	$962$	$2212$
Tin	$232$	$2270$
Gold	$1062$	$2807$
Aluminium	$660$	$2467$
Tungsten	$3410$	$6170$
Lead	$328$	$1740$