Reading a Thermometer

Q. Define thermometers. What are the 2 types of thermometers? State the difference between the two.

Q. Expanaion on heating can be a nuisance .explain giving two examples

Q.

What are Beckmann thermometers used to measure?

Q.

State similarities and differences between the laboratory thermometer and the clinical thermometer

Q.

Clinical thermometers are used to measure the room temperature or temperatures of hot solids and liquids.

1. True
2. False

Q.

A thick glass tumbler cracks when hot water is poured in it. Why?

Q.

A scientist took an iron rod and a wooden rod and wrapped each of them in a piece of paper. There were then heated. It was found that the paper around the metal rod doesn't burn whereas the one around the wooden rod catches fire. Can you explain why?

Q. Why cannot a clinical thermometer be used to measure high temperature?

Q.

Draw a neat labelled diagram of a laboratory thermometer.

Q.

The thermometers with Fahrenheit scale are calibrated from -----------------.

Q.

Mention the precautions taken during the handling of a clinical thermometer.

Q.

What is an upper fixed point of a centigrade scale?

Q.

Why can't we design a laboratory thermometer with the kink so that we can record the temperature even after removing it out of the beaker?

Q.

Laboratory thermometers are used for measuring temperatures for experiments with high degree of precision.

1. True
2. False

Q.

Identify the correct precaution that should be taken while using a clinical thermometer.

1. It should be kept in sunlight for at least 30 minutes before usage.

2. The level of mercury should be kept in line of sight .

3. It should not be washed before use.

4. Hold the thermometer by its bulb.

Q.

Bulb of the lab thermometer should not touch the surface of the___________

Q.

Give one word for the following:

The laboratory thermometer and clinical thermometer are calibrated in _________________________.

Q. Can a clinical thermometer be used to measure the temperature of boiling water? Why?

Q. When a mercury thermometer is inserted into a pot of hot water. What temperature does the reading of the thermometer tell?

1. Temperature of water and surroundings
2. Temperature of the hot water
3. Temperature of the surroundings
4. Temperature of the pot

Q. Assertion :The range of clinical thermometer is between ${35}^{\circ }C$ and ${42}^{\circ }C$ Reason: The normal temperature of the human body is about ${37}^{\circ }C$. Our body temperature usually cannot fall below ${35}^{\circ }C$ or rise above ${42}^{\circ }C$.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Why thermometers only mesures hotness of the body not?

Q.

what type of liquid is used in liquid thermometer

Q.

Question 16

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

Q. The temperature as measured by the thermometer shown here will be:

1. ${84}^{o}C$
2. ${86}^{o}C$
3. ${88}^{o}C$
4. ${90}^{o}C$

Q.

If there are 10 minor divisions between two major divisions, one major division representing $1^{\circ }C$, one minor division will be equal to

1. When the mercury level is in between the divisions

2. When the mercury level coincides with a minor division

3. When the mercury level coincides with a major division

4. Depends on the type of thermometer

Q. If there are $10$ minor divisions between two major divisions, one major division representing $1^{\circ }C$, one minor division will be equal to:

1. ${0.5}^{\circ }C$
2. ${0.3}^{\circ }C$
3. ${0.1}^{\circ }C$
4. ${0.2}^{\circ }C$

Q. In a thermometer, there are $100$ major divisions between the freezing point and the boiling point of water. If each major division has $5$ minor divisions, what is the minimum reading that can be taken using the thermometer?

1. $0.2{}^{\circ }C$
2. $1{}^{\circ }C$
3. $0.8{}^{\circ }C$
4. $1.2{}^{\circ }C$

Q. One should read a thermometer by keeping the level of its mercury along one's line of sight, in order to avoid ________.

1. any damage to eyes
2. reading a wrong value
3. any leakage of mercury
4. the fall of the mercury level

Q. Assertion (A): It is advised not to hold the thermometer by its bulb while reading it.
Reason (R) : If we hold a thermometer by its bulb, the level of mercury in the bulb will get deviated due to the temperature of our hand and this will affect the actual reading.

1. A is false, but R is true.
2. A is true, but R is false.
3. Both A and R are true, but R is not the correct explanation of A.
4. Both A and R are true and R is the correct explanation of A.

Q. On a thermometer, which measures temperature in degree celsius, there are 5 small divisions between $5°Cto6°C$. Each small division will be equal to _____.

1. 
   $0.2°C$
2. 
   $0.3°C$
3. 
   $0.1°C$
4. 
   $0.4°C$