2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?

A. 2-times
B. 3-times
C. 4-times
D. 6 times

The magnetic quantum number (QN) has its values determined directly by the value of_______________?

A. Principal (qn)
B. Azimuthal (qn)
C. Spin (qn)
D. Both a & b

The maximum number of electron in a sub shell with ? = 3fs______________?

A. 6
B. 10
C. 14
D. 18

When an atom absorbs energy the lines in the spectrum will appear which are_________________?

A. Brighter
B. Darker
C. Colourless
D. Hard to locate

Which one is not true about cathode rays ?

A. 9.11×10-31 kg
B. Cast shadow
C. Heat up the platinum foil
D. Cannot ionize

Rutherfords planet like structure was defective and unsatisfactory because_________________?

A. Moving e- accelerate towards the nucleus
B. Continuous spectrum
C. Behavior of electron remain unexplained
D. All

The viscosity of solids is________________?

A. Infinite
B. Negligible
C. Medium
D. No concept of viscosity in solid

Which solids are called true solids _______________?

A. Metallic
B. Amorphous
C. Crystalline
D. Vitreous

The number amino acid units for each turn of helix on average are____________________?

A. 21
B. 23
C. 25
D. 27

If a physical and chemical change takes place at a constant pressure then the heat change during the process is called__________________?

A. Heat of transition
B. Heat of fusion
C. Enthalpy change
D. All of above