Samacheer Kalvi 10th Science Guide Thermal Physics Questions - 1
Question: 1
If the atoms or molecules of a gas do not interact with each other, then the gas is said to be an
(A) Pure gas
(B) Imperfect gas
(C) Ideal gas
(D) Inert gas
Ans: C
Ideal gas
Question: 2
The value of universal gas constant
(A) 1.38 Jmol-1 K-1
(B) 3.81 Jmol-1 K-1
(C) 8.31 Jmol-1 K-1
(D) 8.03 Jmol-1 K-1
Ans: C
8.31 Jmol-1 K-1
Question: 3
Variation in dimensions of any object due to rise in temperature is called as
(A) Evaporation
(B) Thermal convection
(C) Thermal variation
(D) Thermal expansion
Ans: D
Thermal expansion
Question: 4
If a substance is heated or cooled, the change in mass of that substance is
(A) Positive
(B) Negative
(C) Zero
(D) None of the above
Ans: C
Zero
Question: 5
Temperature is the average _____ of the molecules of a substance.
(A) Difference in T.E. and P.E.
(B) Difference in K.E. and T.E.
(C) Difference in K.E. and P.E.
(D) Sum of P.E. and K.E.
Ans: A
Difference in T.E. and P.E.
Question: 6
If a substance is heated or cooled, the linear expansion occurs along the axis of
(A) X or – X
(B) Y or – Y
(C) Both a and b
(D) All of these
Ans: C
Both a and b
Question: 7
Absolute scale is also called as
(A) Fahrenheit scale
(B) Centigrade scale
(C) Celsius scale
(D) Kelvin scale
Ans: D
Kelvin scale
Question: 8
At constant temperature volume is inversely proportional to pressure of a gas is known as
(A) Avogadro’s law
(B) Boyle’s law
(C) Charle's law
(D) None of these
Ans: B
Boyle’s law
Question: 9
SI unit of heat is
(A) Kelvin
(B) Kilo calorie
(C) Calorie
(D) Joule
Ans: D
Joule
Question: 10
Temperature is a property which determining
(A) Amount of heat a body contains
(B) Thermal energy
(C) Total absolute energy a body has
(D) Direction of flow of heat
Ans: D
Direction of flow of heat
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