The molar mass of an organic acids is determined by____________?
(A) Depression of freezing point
(B) Volumetric method
(C) Victor Meyer’s method
(D) Osmosis method
Presence of nitrogen in organic compounds is tested as__________?
(A) Nitrogen gas
(B) NH3
(C) CN‾
(D) NO
Which of the following gases shows more ideal behaviour at 0°C___________?
(A) H2
(B) CH4
(C) He
(D) NH3
The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
(A) 159.6kJ
(B) 135.5 KJ
(C) 110.5 KJ
(D) 80.4 KJ
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°
Which one of the following is the correct sequence according to atomic weights?
(A) Fe>Co> Ni
(B) Co > Ni > Fe
(C) Ni> Co> Fe
(D) Co >Fe>Ni
Alpha particles can be detected by using___________?
(A) Gold foils
(B) Barium sulphate
(C) Zinc sulphide screen
(D) Thin Aluminium sheet