Effect of Heat on Liquids

Q.

Name a thermometric fluid.

Q.

Explain how a clinical thermometer is used to measure human body temperature.

Q.

Why did water pipes burst in cold?

Q. Which of the following is the consequence of the thermal expansion of water?

1. Bursting of plant’s capillaries during winter.
2. Evaporation of water.
3. Preserving the aquatic life during the very cold weather.
4. All the above.

Q.

Which of the following components of a mercury thermometer is responsible for keeping the level of mercury from falling even after we take it out of our mouth?

1. Kink
2. Capillary tube
3. Bulb
4. Sealed end

Q. Liquid is filled in a flask up to a certain point. When the flask is heated, the level of the liquid ___________ .

1. immediately starts increasing
2. rises abruptly
3. initially falls and then rises
4. falls abruptly

Q. When doing an experiment to measure the temperature at which water boils, Akash keeps the laboratory thermometer completely immersed in water and without touching the surface or bottom of the beaker, whereas Susweta does the same experiment with the thermometer touching the bottom of the beaker. Who is more likely to get an accurate reading?

1. Neither Akash nor Susweta
2. Akash
3. Susweta
4. Both Akash and Susweta

Q. Mercury when temperature decreases and when temperature increases.

1. expands
2. flows
3. remains still
4. contracts

Q. Mercury is used in thermometers because:

1. It is a liquid metal.
2. It expands or contracts with temperature.
3. It is a non-metallic liquid.
4. Mercury does not stick to glass walls.

Q. Mercury when temperature decreases and when temperature increases.

1. expands
2. flows
3. remains still
4. contracts

Q. In cold countries, water pipes burst sometimes, because _____.

1. pipe contracts
2. water expands on freezing
3. when water freezes, pressure increases
4. when water freezes, it takes heat from pipes

Q. The mode of heat transfer in fluids is convection.

1. True
2. False

Q.

After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.

1. hotter

2. strikingly colder

3. mildly colder

4. same as before