chemistry

EAMCET QUESTIONS FROM CHAPTER  GASEOUS STATEPART-1

1.The average kinetic energy of one molecule of an ideal gas at 27^oC and 1 atm. Pressure is

1) 900 cals K-1 mol-1	2.	6.21×10-21 J K-1 molecule-1
3) 336.7 J.K-1 molecule -1	4. 374.3 J.k-1 mol-1

2.The vapor of a substance effuses through a small hole at the rate of 1.3 times faster than SO₂gas at 1 atm. pressure and 500K The molecule weight of the gas is

1) 49.2                        2) 37.9                         3) 41.6                        4) 83.2

3.40 grams of a sample of carbon on combustion left 10% of it unreached. The volume of oxygen required at STP for this combustion reaction is

1. 22.4l                       2. 67.2 l                       3. 11.2 l                      4. 44.8 l

4.In a flask of ‘V’ litres , 0.2 moles of O₂, 0.4 moles of N₂, 0.1 moles of NH₃and 0.3 moles of He gases are present at 27^oC. If total pressure exerted by these non-reacting gases is 1 atm, the partial pressure exerted by N₂gas is

1. 0.4 atm                   2. 0.3 atm                    3. 0.2 atm                   4. 0.1 atm

5.What is the temperature at which the kinetic energy of 0.3 moles of Helium is equal to the kinetic energy of 0.4 moles of Argon at 400 K ?

	1) 400 K	2) 873 K	3) 533 K	4) 300K
43.

6.A certain mass of a gas occupies a volume of 2 litres at STP. To what temperature the gas must be heated to

double its volume, keeping the presure constant?

1) 100 K                     2) 273 K                      3) ₂₇₃⁰ _C                  4)

7.Which of the following set of variables give a straight line with a negative slope when plotted ?

(P = vapour pressure. T = Temperature in K)

y-axis	x-axis	y-axis	x-axis
1) P	T	2)	T
3)	P	4)

8.At. T(K), 100 L of dry oxygen is present in a sealed container. It is subjected to silent electric discharge, till the volumes of oxygen and ozone become equal. What is the volume (in litres) of ozone formed at T (K)?

1) 50                           2) 60                            3) 30                           4) 40

9.A and B are ideal gases. The molecular weights of A and B are in the ratio of 1 : 4, the pressure of a gas mixture containing equal weights A and B is P atm. What is the partial pressure of 'B' in the mixture?

(1)                               (2)                               (3)                               (4)

10.What is the ratio of kinetic energies of 3 gm. of hydrogen and 4 grams of oxygen at T K?

(1) 12 : 1                     (2) 6 : 1                       (3) 1 : 6                       (4) 24 : 1