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Question (31)

QN004300

A laboratory thermometer has a range from –20°C to 80°C. What is its total measuring range?

(A) 60°C
(B) 80°C
(C) 100°C
(D) 120°C

Correct Answer: C

Explanation:

80 − (−20) = 100°C

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Question (32)

QN004301

While measuring water temperature, the bulb of a laboratory thermometer should

(A) touch the bottom of the beaker
(B) touch the side of the beaker
(C) remain immersed without touching the container
(D) remain above the water surface

Correct Answer: C

Explanation:

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Question (33)

QN004302

A laboratory thermometer should be held

(A) horizontally
(B) vertically
(C) upside down
(D) tilted at any angle

Correct Answer: B

Explanation:

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Question (34)

QN004303

Temperature should be read from a laboratory thermometer

(A) after removing it from water
(B) while it is immersed in water
(C) after drying it completely
(D) before immersion

Correct Answer: B

Explanation:

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Question (35)

QN004304

Why should the eye be directly in line with the liquid level while taking a reading?

(A) To avoid battery loss
(B) To avoid reading error
(C) To increase temperature
(D) To cool the thermometer

Correct Answer: B

Explanation:

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Question (36)

QN004305

A student removes a laboratory thermometer from warm water before reading it. The reading is likely to

(A) increase
(B) remain unchanged forever
(C) decrease quickly
(D) become negative

Correct Answer: C

Explanation:

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Question (37)

QN004306

Which liquid is commonly used in laboratory thermometers and is often coloured red for visibility?

(A) Water
(B) Alcohol
(C) Milk
(D) Oil

Correct Answer: B

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Question (38)

QN004307

Why is a laboratory thermometer generally not used to measure body temperature?

(A) It has no scale
(B) It cannot retain the reading after removal from the body
(C) It is too short
(D) It has no bulb

Correct Answer: B

Explanation:

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Question (39)

QN004308

During boiling, the temperature of boiling water remains

(A) continuously increasing
(B) continuously decreasing
(C) constant while boiling continues
(D) equal to room temperature

Correct Answer: C

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Question (40)

QN004309

Anna Mani is remembered in the context of temperature and weather studies because she

(A) invented mercury
(B) developed weather-measuring instruments in India
(C) discovered Celsius scale
(D) discovered absolute zero

Correct Answer: B

Explanation:

Her work helped India develop indigenous weather-measuring instruments and strengthened meteorological observations.

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Question (31)

A laboratory thermometer has a range from –20°C to 80°C. What is its total measuring range?

Explanation:

Link:

Question (32)

While measuring water temperature, the bulb of a laboratory thermometer should

Explanation:

Link:

Question (33)

A laboratory thermometer should be held

Explanation:

Link:

Question (34)

Temperature should be read from a laboratory thermometer

Explanation:

Link:

Question (35)

Why should the eye be directly in line with the liquid level while taking a reading?

Explanation:

Link:

Question (36)

A student removes a laboratory thermometer from warm water before reading it. The reading is likely to

Explanation:

Link:

Question (37)

Which liquid is commonly used in laboratory thermometers and is often coloured red for visibility?

Explanation:

Link:

Question (38)

Why is a laboratory thermometer generally not used to measure body temperature?

Explanation:

Link:

Question (39)

During boiling, the temperature of boiling water remains

Explanation:

Link:

Question (40)

Anna Mani is remembered in the context of temperature and weather studies because she

Explanation:

Link:

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