True-False

Question 11 Mark

The real expansion of a liquid is equal to the difference between apparent expansion and expansion of the vessel.

Answer

Correct Statement: Real expansion = Apparent expansion + expansion of vessel.

Question 21 Mark

The S.I. unit of coefficient of thermal expansion is per kelvin.

Answer

True.

Question 31 Mark

If Q calorie heat is produced by spending mechanical work W then the mechanical equivalent of heat J = W × Q?

Answer

Correct Statement: $J =\frac{ W }{ Q }$.

Question 41 Mark

A gas which obeys the relation PV = nRT at all temperature and pressure is called real gas.

Answer

True.

Question 51 Mark

Number of molecules N in gas is equal to the product of the number of mole (n) of gas and Avogadro’s number (NA)?

Answer

True.

Question 61 Mark

Boltzmann's constant $k$ is equal to the product of universal gas constant $R$ and Avogadro number $\left( N _{ A }\right)$ ?

Answer

False.
Correct Statement: $K _{ B }=\frac{ R }{ N _{ A }}$

Question 71 Mark

According to Avogadro’s law, equal volumes of all gases under same pressure have equal numbers of molecules.

Answer

True.

Science True-False