1.  What is value of Boyle’s temperature of ethane gas when $$a=5.489\ dm^{6}atm\ mol^{-2}$$ and $$b=0.0638\ dm^{3}atm\ mol^{-1}$$

A. 1048 K

B. 104.8 K

C. 209.6 K

D. 290.6 K

2.  The value of universal gas constant R depends upon the

A. Temperature of the gas

B. Volume of the gas

C. Number moles of the gas

D. None of these

3.  The Boyle’s temperature for the ideal gases is given by

A. $$\frac{a}{R}$$

B. $$\frac{a}{bR}$$

C. $$\frac{2a}{bR}$$

D. None of these

4.  The ratio of van der Waals’ constants a and b has the dimensions of

A. $$atm\ mole^{-1}$$

B. $$L\ mole^{-1}$$

C. $$atm.L\ mole^{-1}$$

D. $$atm\ mole^{-2}$$

5.  A gas expanse through a porons plug and exhibits cooling if its temperature is

A. More than inversion temperature

B. Less than inversion temperature

C. Less than critical temperature

D. Less than Boyle’s temperature

6.  A gas behaves like an ideal gas at

A. High pressure and low temperature

B. High pressure and high temperature

C. At low pressure and increasing in volume

D. Decreasing velocity by lowering temperature

7.  To which of the following gaseous mixture is Dalton’s law not applicable?

A. $$He+Ne+SO_{2}$$

B. $$NH_{3}+HCl+HBr$$

C. $$O_{2}+N_{2}+CO_{2}$$

D. $$N_{2}+H_{2}+O_{2}$$

8.  The degree of dissociation of $$Cl_{2}$$ at 1500K is 0.45 according to the reaction $$Cl_{2}\rightarrow 2Cl$$ assuming that both $$Cl_{2}$$ and Chlorine atoms behave like ideal gases, calculate the density of the mixture if the pressure of the mixture is 1.5 atm

A. $$0.596\ g.l^{-1}$$

B. $$0.496\ g.l^{-1}$$

C. $$0.696\ g.l^{-1}$$

D. $$0.396\ g.l^{-1}$$

9.  A gas is kept at 1 atm pressure. To compress it to $$\left (\frac{1}{4} \right )^{th}$$ of its initial volume, the pressure to be applied is

A. 1 atm

B. 2.0 atm

C. 4.0 atm

D. 0.25 atm

A. $$20^{\circ}C$$
B. $$30^{\circ}C$$