The letters s p d and f are used to represent which quantum numbers________________?

A. Principal
B. Azimuthal
C. Magnetic
D. Spin

The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?

A. 7
B. 10
C. 12
D. 16

Colour of fluorescene produced by cathode rays depends upon________________?

A. Temperature
B. Pressure
C. Volume
D. Composition of glass

Positive rays are produced__________________?

A. By burning of gas
B. By cooling of the gas
C. By the bombardment of cathode rays on gas molecules
D. From anode like cathode rays produced from cathode

The relationship between energy of a photon of light and its frequency is given by________________?

A. De-broglie duel nature of matter
B. Bohrs model
C. Plancks quantum theory
D. Rutherfords atomic model

The correct electronic configuration of Cu is ___________________?

A. [ar]4s1
B. [ar]4s2
C. [ar]3d104s1
D. [ar]3d94s2

Atomic orbits having same energy are called________________?

A. Degenerate orbitals
B. Bonding molecular orbitals
C. Anti bonding molecular orbitals
D. Half filled orbitals

When electrons collide with heavy metals than ___________ are produced?

A. Beta-rays
B. Alpha-rays
C. X-rays
D. Gamma-rays

Atom with higher atomic number produces X-rays of__________________?

A. Shorter wavelength
B. Larger wavelength
C. X-ray not produced
D. All are possible

Space around nucleus where finding probability of electrons is maximum is called ____________________?

A. Orbital
B. Orbit is elliptical
C. Subshell
D. Electron cloud