What is the relation between 0.50 mole H2 gas and 1.0 mole He gas at STP ?
have equal average kinetic energies
have equal molecular speeds
occupy equal volumes
have equal effusion rates
A closed flask contains water in all its three states solid, liquid and vapour at 0oC. In this situation,what will be the average kinetic energy of water molecules ?
the greatest in all the three states
the greatest in vapour state
the greatest in the liquid state
the greatest in the solid state
Which of the following gives the correct relation between internal energy and pressure of a gas per unit volume ?
P= 2/3 E
P= 3/2E
P=1/2 E
P= 2E
What happens to the surface tension of water when the temperature is increased ?
increases
decreases
remains same
shows irregular behavior
Through the two ends of a glass tube of length 200 cm HCl gas and NH3 are allowed to enter. At what distance the white ring of ammonium chloride will first appear?
81.1 cm from HCl end
81.1 cm from NH3 end
118.9 cm from HCl end
The ring will not form
If 10-4 dm3 of water is introduced into a 1.0 dm3 flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established?
[ Given, vapour pressure of H2O at 300 K is 3170 Pa; R = 8.314 JK-1 mol-1 ]
5.56 x 10-3 mol
1.53 x 10-2 mol
4.46 x 10-2 mol
1.27 x 10-3 mol
What is the correct value of the gas constant 'R' from the following ?
0.082 L- atm K
0.082 L- atm K -1 mol-1
0.082 L atm Kmol-1
0.082 L-1 atm-1 K mol
Which among the following statement is correct regarding the gas equation PV= nRT ?
n is the number of molecules of a gas
V denotes volume of one mole of the gas
n moles of the gas have a volume V.
P is the pressure of the gas when only one mole of the gas is present.
What is the coordination number of carbon in diamond ?
four and its unit cell has eight carbon atoms
four and its unit cell has six carbon atoms
six and its unit cell has four carbon atoms
four and its unit cell has four carbon atoms
The molar volume of KCL and NaCl are 37.46 mL and 27.94 mL respectively. What is the ratio of the unit cube edges of the crystals ?
1.296
1.116
1.341
0.950
