chemistry

EAMCET PREVIOUS PAPER QUESTIONS FORM GASEOUS STATE PART-1

1.The average kinetic energy of one molecule of an ideal gas at 27oC 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 SO2 gas 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 NH3 and 0.3 moles of He gases are present at 27oC. If total pressure exerted by these non-reacting gases is 1 atm, the partial pressure exerted by N2 gas 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

6.What is the numerical value of gas constant R in J.mol-1K-1
1)0.0821
2) 83140000
3) 8.314
4) 1.987

7.The compressibility factor for a ideal gas is
1) 1.5
2) 1.0
3) 2.0
4) infinite

8.The kinetic energy of one mole of an ideal monoatomic gas at 270c
1) 900cals
2) 450 cals
3) 500cals
4) 1250 cals

9.The density of neon will be highest at 
1) STP
2) 2730c,1 atm
3) oc,2atm
4) 273c,2atm

10.The rate of diffusion of methane at a given temp.is twice that of gas X. The molecular weight of X is
1)64
2)32
3) 4
4) 8