Which of the following gases shows more ideal behaviour at 0°C___________?
A. H2
B. CH4
C. He
D. NH3
Chemistry Mcqs
The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
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___________?
Azimuthal quantum number defines___________?
A. e/m ratio of an electron
B. S of an electron
C. Angular momentum of an electron
D. Magnetic momentum of an electron
Magnetic quantum number specifies___________?
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 _________?
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__________?
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?
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___________?
Alpha particles can be detected by using___________?
A. Gold foils
B. Barium sulphate
C. Zinc sulphide screen
D. Thin Aluminium sheet
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
A. 0.115
B. 0.900
C. 0.015
D. 0.215
The PH of pure water at 25°C, kw=1×10-4____________?
The PH of pure water at 25°C, kw=1×10-4____________?
A. 0
B. 7
C. 14
D. None of above