Correct Marks 1
Incorrectly Marks 0
Q 1. An atom with atomic number 18 and mass number 40, has the following arrangement
18p, 18e, 22n
18p, 18e, 40n
22p,18e, 18n
22p,22e,18n
Correct Marks 1
Incorrectly Marks 0
Q 2. The isotope of carbon used in radiocarbon dating is
{tex}^{12}_6C{/tex}
{tex}^{13}_6C{/tex}
{tex}^{14}_6C{/tex}
{tex}^{15}_6C{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 3. Which one of the following is correct electronic configuration of sodium ?
2,8
8,2,1
8,2
2,8,1
Correct Marks 1
Incorrectly Marks 0
Q 4. Particle in cathode rays have same charge to mass ratio as
{tex}\alpha{/tex}-particles
{tex}\beta{/tex}-rays
{tex}\gamma{/tex}-rays
Protons
Correct Marks 1
Incorrectly Marks 0
Q 5. Which of the following particles has maximum charge to mass ratio ?
Electrons
Protons
!-particle
Neutrons
Correct Marks 1
Incorrectly Marks 0
Q 6. Which of the following pairs of species are iso-electronic ?
{tex}H_2O, H_2S{/tex}
{tex}NO_3^-,CO_3^{2-}{/tex}
{tex}H_3O^+, K^+{/tex}
HF, HCI
Correct Marks 1
Incorrectly Marks 0
Q 7. Which of the following traids represents isotones ?
{tex}_6C^{12}, _6C^{13}, _6C^{14}{/tex}
{tex} _{18}Ar^{40}, _{20}Ca^{42}, _{21}Sc^{43}{/tex}
{tex} _{18}Ar^{40}, _{20}Ca^{40}, _{21}Sc^{41}{/tex}
{tex} _7N^{14}, _8O^{16}, _9F^{19}{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 8. Which of the following statements is correct ?
{tex}_7N^{14} {/tex} and {tex}_6C^{13}{/tex} are isotones
{tex}_7N^{14} {/tex} and {tex}_6C^{14}{/tex} are isotopes
{tex}_7N^{14} {/tex} and {tex}_6C^{12}{/tex} are isobars
{tex}_7N^{14} {/tex} and {tex}_6C^{15}{/tex} are isotones
Correct Marks 1
Incorrectly Marks 0
Q 9. Which of the followings statement is not correct ?
Isotones are atoms of different elements having same number of neutrons
Isotopes are atoms of differenet elements having same number of protons
Isobars are atoms of different elements having same number of neutrons
Isotones and isobars are atoms of different elements
Correct Marks 1
Incorrectly Marks 0
Q 10. When atoms of the gold sheet are bombarded by a beam of {tex}\alpha{/tex}-particles, only a few {tex}\alpha{/tex}-particles get deflected whereas most of them go straight undeflected This is because:
the force of attraction on {tex}\alpha{/tex}-particles by the oppositely charged electron is not sufficient
the nucleus occupies much smaller volume as compared to the volume of atom
the force of repulsion on fast moving {tex}\alpha{/tex}-particles is very small
the neutrons in the nucleus do not have any effect on {tex}\alpha{/tex}-particles
Correct Marks 1
Incorrectly Marks 0
Q 11. A region in space around the nucleus of an atom where the probability of finding the electron is maximum is called
sub-level
orbit
orbital
electron shell
Correct Marks 1
Incorrectly Marks 0
Q 12. Which of the following orbital does not make sense?
3d
3f
5p
7s
Correct Marks 1
Incorrectly Marks 0
Q 13. The maximum number of electrons with clockwise spin that can be accomodated in a f-subshell is
10
3
5
7
Correct Marks 1
Incorrectly Marks 0
Q 14. Indicate which electronic configuration amongst the following correctly represent SULPHUR atom ?
{tex}1s^22s^22p^63s^23p^23d^2{/tex}
{tex}1s^22s^22p^63s^23p^24s^2{/tex}
{tex}1s^22s^22p^63s^23p^64s^14p^1{/tex}
{tex}1s^22s^22p^63s^23p^4{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 15. As we move away from nucleus, the energy of orbit
decreases
increases
remains unchanged
none of these
Correct Marks 1
Incorrectly Marks 0
Q 16. Electronic configuration of calcium atom can be written as
{tex}[Ne] 4p^2{/tex}
{tex}[Ar] 4s^2{/tex}
{tex}[Ne] 4s^2{/tex}
{tex}[Kr] 4p^2{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 17. Which one of the following pairs of atoms/atom-ion have identical ground state configuration ?
Li+ and He+
Cl- and Ar
Na and K
F+ and Ne
Correct Marks 1
Incorrectly Marks 0
Q 18. The correct electronic configuration of Cu(29) is
{tex}1s^22s^22p^63s^33p^63d^{10}4s^1{/tex}
{tex}1s^22s^22p^63s^23p^53d^{11}4s^1{/tex}
{tex}1s^22s^22p^63s^23p^63d^94s^2{/tex}
{tex}1s^22s^22p^63s^23p^53d^{10}4s^2{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 19. The number of d-electrons in Fe{tex}^{2+}{/tex} (atomic number = 26) is equal to that of
p-electrons in {tex}_{10}\mathrm{Ne} {/tex}
s-electrons in {tex}_{12}\mathrm{Mg}{/tex}
d-electrons in {tex}\mathrm{Fe}{/tex}
p-electrons in {tex}\mathrm{CI}{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 20. Which of the following is the electronic configuration of Cu2+ (Z = 29) ?
{tex}[Ar]4s^13d^8{/tex}
{tex}[Ar]4s^23d^{10}4p^1{/tex}
{tex}[Ar]4s^13d^{10}{/tex}
{tex}[Ar]3d^9{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 21. Unpaired electrons in {tex}Ni^{++}{/tex}, (Z = 28) is
0
2
4
8
Correct Marks 1
Incorrectly Marks 0
Q 22. Which of the following electronic configurations is not possible according to Hund's rule ?
{tex}1s^22s^2{/tex}
{tex}1s^22s^1{/tex}
{tex}1s^22s^22p^1_x2p^1_y2p^1_z{/tex}
{tex}1s^22s^22p^2_x2p^1_y2p^0_z{/tex}
Correct Marks 1
Incorrectly Marks 0
Q 23. Which of the following statement are wrong ?
An atom is electrically neutral
An atom & its ion have an unequal number of protons
The size of a cation is smaller than that of corresponding atom
An atom & its corrosponding anion have equal number of electrons
Correct Marks 1
Incorrectly Marks 0
Q 24. Which of the following sub-atomic particles is/are present in the nucleus of an atom?
proton
electron
positron
meson
Correct Marks 1
Incorrectly Marks 0
Q 25. A particle moving with a velocity of 10 m/s is moving with a uniform acceleration of {tex}5 m/s^2{/tex}. What will be the final velocity of the particle after 5 s:
30 m/s
32 m/s
36 m/s
35 m/s