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1.
Which of the following sets of quantum number is correct for an electron in 
-orbital?
-orbital?
2.
Number of electrons in 
are:
are:
3.
The ratio of radii of two nuclei with mass numbers 27 and 64 is
4.
The atomic number of Ni and Cu are 28 and 29 respectively. The electronic configuration
represents
represents
5.
The three quantum numbers 
and 
are the outcome of:
and are the outcome of:
6.
Which has the highest 
ratio?
ratio?
7.
The electronic configuration of an element in ultimate and penultimate orbitals is 
. If n 4 and x 5 then number of protons in the nucleus is
. If n 4 and x 5 then number of protons in the nucleus is
8.
The de-Broglie wavelength of a tennis ball of mass 60g moving with a velocity of 10 m/s is approximately (Planck's constant, 
)
)
9.
The work-function for photoelectric effect :
10.
Line spectra is characteristic of :