(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Why does a substance expand on heating?

A small gap is left between two iron rails of the railway track. Why?

Why are bridges made of steel girders put on rollers?

What is the relation between α and γ?

A copper wire 10 cm long is heated from 20⁰C to 30⁰C. Find the increase in length of the wire, if coefficient of linear expansion of copper is 1.7 X 10^-5oC^-1

One liter of mercury at 10⁰C is heated to 30⁰C. Find the increase in the volume of mercury. The coefficient of cubical expansion of mercury is 1.8 X 10^-4 0C^-1.

Why is a ventilator provided in a room?

Is it possible to heat a liquid or gas from above? Explain your answer.

Explain the following:
Water is heated generally from below.

Explain the following:
Land becomes warmer than water during the day.

State three main characteristics of a thermometric substance.

Name a substance which is an insulator of heat.

Is it possible to boil water in a thin paper container? Explain with a reason.

What is the principle of the thermometer?

State the advantages and disadvantages of mercury and alcohol as thermometric liquids.

What is meant by the lower and upper fixed points of a thermometer?

Draw a neat and labeled diagram of a clinical thermometer

State one use of each of the following type of thermometer: 
Laboratory thermometer

State one use of each of the following type of thermometer: 
Clinical thermometer

State one use of each of the following type of thermometer: 
Six's maximum and minimum thermometer.