Explain the given sentenceA glass tumbler may develop a crack due to uneven thermal expansion after pouring hot water into the otherwise cool glass.

Academic Chemistry NCERT Class 7

Glass is a poor conductor of Heat and Electricity. So when we pour hot water in a glass, the inner lining of the glass expands. But the outer lining of glass is still cool and does not expand. This causes the glass to crack due to uneven Thermal Expansion.

Tutorialspoint

Updated on: 10-Oct-2022

67 Views

A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature "
Yesterday I was pouring hot water in a glass cup and it shattered. Can you explain why is it so?
(a) Explain why, a stick half immersed in water appears to be bent at the surface. Draw a labelled diagram to illustrate your answer.(b) A coin in a glass tumbler appears to rise as the glass tumbler is slowly filled with water. Name the phenomenon responsible for this effect.
Light travels more quickly through water than through glass.(a) Which is optically denser : water or glass?(b) If a ray of light passes from glass into water, which way will it bend : towards the normal or away from the normal?
Refractive index of glass relative to water is 9: 8. What is the refractive index of water relative to glass?
Why an ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not?
Paheli asked for a glass of water from Boojho. He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed. Which of the following should be Boojho’s answer?(a) Evaporation of water from the glass.(b) Water that seeped out from the glass.(c) Evaporation of atmospheric water vapour.(d) Condensation of atmospheric water vapour.
What is thermal expansion?
Thermal Expansion of Solids
Which is easier to hold in hand: a kulhar (earthen pot) or a glass tumbler? Why?
Explain why, a piece of glass sinks in water but it floats in mercury.
Can hot water be a pollutant? Explain.
Which has higher refraction index : water of glass?
As light rays pass from water into glass, are they refracted towards the normal or away from the normal?
Draw a labelled ray diagram to show how a ray of light passes through a parallel sided glass block:(a) if it hits the glass block at 90° (that is, perpendicular to the glass block)(b) if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block).

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements