Explain
The boiling point of a liquid rises on increasing pressure.

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(a)

Explain
The level of mercury in a capillary tube is lower than the level outside when a capillary tube inserted in the mercury.

5

(a)

Tea or coffee is sipped from a saucer when it is quite hot.

5

(a)

Calculate the total and average kinetic energy of 32 g methane molecules at 27^oC(R = 8.314 JK^-1 mol^-1 )

5

(a)

Nitrogen molecule(N₂ )has radius of about 0.2 nm. Assuming that nitrogen molecule is spherical in shape, calculate volume of a single molecule of N₂

5

(a)

Density of a gas is found to be 5.46 g/dm³  at 300 K and 2 bar pressure.What will be its density at STP?

5

(a)

A gaseous mixture containing 50 g of nitrogen and 10 g of oxygen were enclosed in a vessel of 10 L capacity at 27^oC.Calculate The partial pressure of each gas.

5

(a)

A liquefied petroleum gas (LPG) cylinder weight 14.8 Kg when empty.  When full it weighs 29.0 Kg and shows a pressure of 2.5 atm. In the course of use at 27\(^{o}\) C, the mass of the full cylinder is reduced to 23.2 Kg. Find out the volume of the gas in cubic meters used up at the normal usage conditions and final pressure inside the cylinder. Assume LPG to be n-butane with a normal boiling point of  0\(^{o}\) C.

5

(a)

State and explain Boyle's law. Represent the law graphically.

5

(a)

Pay load is defined as the difference between the mass of the displaced air and the mass of the balloon. Calculate the pay load when a balloon of radius 10 m, mass 100 kg is filled with helium at 1.66 bar at 27^oC (Density of air = 1.2 kg m-3 and R = 0.083 bar dm³ K-1 mol^-1).

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(a)