E-PolyLearning

1. In a group, atomic radii increase due to successive increase of
a. electronic shells
b. proton shells
c. neutron shells
d. nucleus
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Answer: (a).electronic shells

2. Distance at which attractive forces of hydrogen overcome repulsive forces is
a. 75.2pm
b. 75.3pm
c. 75.5pm
d. 75.4pm
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Answer: (d).75.4pm

3. Unit of electro negativity is
a. one
b. two
c. none
d. three
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Answer: (c).none

4. Ionization energies is influenced by nature of
a. orbital
b. nuclear
c. atom
d. electron
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Answer: (a).orbital

5. First ionization energy of carbon is
a. 1084
b. 1085
c. 1086
d. 1087
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Answer: (c).1086

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