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PHYSICS [1 Mark Question Answer]

Unit - 5.2 Temperature And Its Measurement · ICSE STD 7 (ICSE - English Medium). 8 questions.

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[1 Mark Question Answer]

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8 questions · timed · auto-graded

Question 11 Mark
Define upper standard point and state its value in ${ }^{\circ} C$, ${ }^{\circ} F$ and Kelvin.
Answer
The upper standard point in ${ }^{\circ} C$ is $100^{\circ} C$. The upper standard point in kelvin is 373 K. The upper standard point in ${ }^{\circ} F$ is $212^{\circ} F$.
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Question 21 Mark
Define lower standard point and state its value in ${ }^{\circ} C$, ${ }^{\circ} F$ and Kelvin.
Answer
Lower standard point Or ice point is the temperature of pure melting ice at normal atmospheric pressure the value in C is $-273.15^{\circ} C$ and in K is 0k.
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Question 31 Mark
What do you understand by the term “standard points of a thermometer?
Answer
The fixed temperatures marked on the stem of the thermometer by the common consent of scientists are known as standard points of the thermometer.
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Question 41 Mark
Given below statement is incorrect. Write the correct statement :
$1^{\circ} C$ rise in temperature is equal to 274 K rise in temperature.
Answer
$1^{\circ} C$ rise in temperature is equal to 274 K rise in temperature.
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Question 51 Mark
Given below statement is incorrect. Write the correct statement :
The temperature at which mercury freezes is $-93^{\circ} C$.
Answer
The temperature at which mercury freezes is $-38.83^{\circ} C$.
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Question 61 Mark
Given below statement is incorrect. Write the correct statement :
Upper fixed point on Fahrenheit thermometer is $100^{\circ} F$.
Answer
Upper fixed point on Fahrenheit thermometer is $212^{\circ} F$.
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Question 71 Mark
Given below statement is incorrect. Write the correct statement :
A good thermometric liquid should absorb large amount of heat energy from the body whose temperature is being recorded.
Answer
A good thermometric fluid should absorb large amount of heat energy from the body whose temperature is being recorded.
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Question 81 Mark
Given below statement is incorrect. Write the correct statement :
$0^{\circ} C$ is equal to zero kelvin.
Answer
$0^{\circ} C$ is equal to 273 kelvin.
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[1 Mark Question Answer] - PHYSICS STD 7 Questions - Vidyadip