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MCQ Questions for CBSE Class 12 with Answers
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Melting and Boiling
1.
What is it called when a gas turns into a liquid?
Boiling
Freezing
Condensation
Melting
2.
What is it called when a solid turns into a liquid?
Melting
Condensation
Freezing
Boiling
3.
What is it called when a liquid turns into a gas?
Condensation
Boiling
Melting
Freezing
4.
What is it called when a liquid turns into a solid?
Freezing
Melting
Boiling
Condensation
5.
What temperature is the boiling point for water?
0 degrees C
32 degrees C
100 degrees F
100 degrees C
6.
What is it called when liquid becomes a gas only at the surface of the liquid?
Freezing
Melting
Evaporation
Condensation
7.
What are the conditions used to determine the 'standard state' of an element?
25 degrees F and 100 atmospheres of air pressure
0 degrees C and no air pressure
100 degrees C and one atmosphere air pressure
25 degrees C and one atmosphere air pressure
8.
What state or phase is the most common 'standard state' of the elements?
Liquid
Solid
Gas
Plasma
9.
What is it called when rocks underground get so hot they become liquid?
Magma
Metamorphic
Plasma
Sedimentary
10.
What element is both a liquid and a metal at room temperature?
Titanium
Mercury
Iron
Gold
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