(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Calculate the amount of heat released when 5.0 g of water at 20°C is changed into ice at 0°C.
(Specific heat capacity of water = 4.2 J/g°C
Specific latent heat of fusion of ice = 336 J/g)

An electric immersion heater is rated 1250 W. Calculate the time in which it will heat 20 kg of water at 5°C to 65°C.

Derive an expression for finding out the specific heat capacity of a body (solid) from the readings of an experiment given below:

(i) Mass of empty calorimeter (with stirrer) = m₁ gm

(ii) Mass of the metal piece = M gm

(iii) Mass of colorimeter and water = m2 gm

(iv) Initial temperature and water = t₁°C

(v) Temperature of hot solid (metal piece) = t₂ °C

(vi) Final temperature of the mixture = t°C

(vii) Specific heat of calorimeter = 0.4 J gm / °C

The diagram below shows a cooling curve for 200 g of water. The heat is extracted at the rate of 100 Js^-1. Answer the questions that follow:

1. Calculate specific heat capacity of water.
2. Heat released in the region BC.

Two metals A and B have specific heat capacities in the ratio 2 : 3. If they are supplied the same amount of heat then

Which metal piece will show a greater rise in temperature given their masses is the same?

Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then

Which metal piece will have greater mass if the rise in temperature is the same for both metals?

Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then

If the mass ratio of metal A and metal B is 3:5 then calculate the ratio in which their temperatures rise.

Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then

If specific heat capacity of metal A is 0.26 Jg^{-1 0}C^-1 then calculate the specific heat capacity of metal B.

Why is water used as a coolant in radiators of a car?

Specific heat capacity of a substance X is 1900 Jkg^-1°C^-1 means ______.

Thermal capacities of substances A and B are same. If mass of A is more than mass of B then:

Which substance will have more specific heat capacity?

Calculate the distance covered by the Ultrasonic wave having a velocity of 1.5 kms^-1 in 14 s, when it is received after reflection by the receiver of the SONAR.

Name the class of the lever shown in the picture below:

Name the waves used in SONAR.

A ______ lever will always have M.A. > 1.

Give one reason for the use of ultrasonic waves in echo depth sounding.

Classify the following into levers:

Claw hammer

Classify the following into levers:

Sugar tongs

State the principle on which SONAR is based.

Two blocks P and Q of different metals having their mass in the ratio 2 : 1 are given same amount of heat. Their temperature rises by same amount. Compare their specific heat capacities.