The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is:
A. CH4
B. CO2
C. C2H4
D. Xe
In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes:
A. Double
B. Same
C. Half
D. Four times
Which of the following gases shows more ideal behaviour at 0°C:
A. H2
B. CH4
C. He
D. NH3
Azimuthal quantum number defines:
A. e/m ratio of an electron
B. Spin of an electron
C. Angular momentum of an electron
D. Magnetic momentum of an electron
Magnetic quantum number specifies___________?
A. Size of orbitals
B. Shape of orbitals
C. Orientation of orbitals
D. All of the above
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is:
A. 2 R
B. R/2
C. 3R/4
D. R/4
Generally the limit of visible spectrum is:
A. 1000 to 300 A°
B. 3800 to 7600 A°
C. 8000 to 10,000 A°
D. 12,000 to 15,000 A°
Alpha particles can be detected by using:
A. Gold foils
B. Barium sulphate
C. Zinc sulphide screen
D. Thin Aluminium sheet
The PH of pure water at 25°C, kw=1×10-4:
A. 0
B. 7
C. 14
D. None of above
The PH of Tears is:
A. 7.0
B. 7.4
C. 7.8
D. 8.2
