Thermometer

Q.

Which one among the following denotes the smallest temperature?

1. 1° on the Celsius scale
   
2. 1° on the Kelvin scale
   
3. 1° on the Fahrenheit scale
4. -1° on the Celcius scale

Q. Which liquid is used in a clinical thermometer?

1. Bromine
2. Distilled water
3. Sea water
4. Mercury

Q.

Which type of thermometer does not contain mercury as one of its components?

Q.

Convert the following temperature to the kelvin scale

25⁰C

Q.

Give reasons for the following statement.
The bore of the capillary tube is narrow in a thermometer.

Q.

Bolometer is used to detect ______________

1. Infrared rays

2. Ultraviolet rays

3. X rays

4. $\gamma$ rays

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. Which of the following reason is true for mercury to be used as a thermometric liquid?

1. Mercury is a good conductor of heat.
2. Mercury is a bad conductor of heat.
3. It does not have a uniform rate of thermal expansion.
4. Its appearance is dull.

Q.

While doing an experiment to measure the temperature at which water boils, Ram keeps the laboratory thermometer completely immersed in water without touching the surface or bottom of the beaker. On the other hand does Shyam does the same experiment with the thermometer touching the bottom of the beaker. Who is more likely to get an accurate reading?

1. Ram and Shyam will get the same result

2. Ram

3. Shyam

4. None of them will be able to get an accurate result

Q. What is mercury
what is clinical thermometer

Q. Why is the digital thermometer preferred over simple clinical thermometer?

1. Bulb size of the clinical thermometer is big.
2. Cost of the digital thermometer is less.
3. Mercury is toxic.
4. The glass used is harmful.

Q. In winter we feel cold inside the house. If we come out in the sun, we feel warm. Why?

1. Cold air is trapped inside the four walls making the atmosphere of the room cold
2. Cold air is trapped outside the four walls making the atmosphere of the room cold
3. Both A and B
4. Cannot say

Q.

Mercury thermometers are increasingly being replaced by digital thermometers. Which of the following is a correct reason for this?

1. Reading of mercury thermometer can have parallax error.

2. Mercury being toxic is difficult to dispose-off.

3. Digital thermometers do not require physical contact to function.

4. Digital thermometers are easier to read than mercury thermometers.

Q. (a) Why does hot air rise up?
(b) How does a hot-air balloon work? [3 MARKS]

Q.

Why mercury is used as a thermometric liquid? State the reasons. [5 MARKS]

Q.

How many different nine-digit numbers can be formed from the number $22,33,55,888$by rearranging its digits so that the odd digits occupy even positions?

1. $16$

2. $4$

3. $60$

4. $5$

Q. Statement I: Mercury has more expansion per ${}^{0}C$ than alcohol.
Statement II: Mercury shows uniform expansion but it sticks to the sides of glass tube.

1. Statement I is incorrect and statement II is correct.
   
2. Statement I is correct and statement II is incorrect.
3. Both statements are correct.
4. Both statements are incorrect.

Q. The liquid used in a clinical thermometer is .

1. bromine
2. water
3. mercury

Q.

Which of the following device is used to measure temperature?

1. Odometer

2. Speedometer

3. Thermometer

4. Barometer

Q.

Mercury is used as a thermometric liquid because

1. It is volatile

2. It is sticky

3. It is opaque and shiny

4. All of these

Q. Which of the following instruments can be used to measure how hot the day is .

1. Thermometer
2. Barometer
3. Odometer
4. Calorimeter

Q.

A good thermometric liquid should absorb a very small amount of heat energy from the body whose temperature is being recorded.

1. True

2. False

Q.

If a completely inflated balloon is kept in the hot son in summer , do you expect anything to happen ? (2m)

Q. Why is it advised not to hold the thermometer by its bulb while reading it?

Q.

In Galileos thermometer, the expansion of _____ is used to measure the temperature.

Q.

Name the thermometric substances used in the following thermometers.

1. Rutherfords maximum thermometer
2. Rutherfords minimum thermometer.

Q. The instrument used for measuring the temperature is called a-

1. Voltmeter
2. Thermometer
3. Calorimeter
4. Ammeter

Q. What precaution needs to be taken while using a clinical thermometer?

1. The thermometer should always be handled through its bulb while reading it.
2. The thermometer should be kept in sunlight for at least 30 minutes before usage.
3. The mercury should be kept in line of sight while reading the thermometer.
4. The thermometer should be washed with hot water before usage.

Q.

Convert the following temperatures to the Kelvin scale.

1. $28°C$
2. $18°C$
3. $38°C$

Q.

Convert the following temperatures of the kelvin scale in degree Celcius

$470\mathrm{K}$