Chemistry Class-11: Chapter –3. Classification of Elements and Periodicity in Properties-Part – 4

Download PDF of This Page (Size: 178K)

II. Multiple Choice Questions (Type-II)

In the following questions two or more options may be correct.

Question: 14

Which of the following elements can show covalency greater than 4?

(i) Be

(ii) P

(iii) S

(iv) B

Answer:

Question: 15

Those elements impart colour to the flame on heating in it, the atoms of which require low energy for the ionisation (i.e., absorb energy in the visible region of spectrum). The elements of which of the following groups will impart colour to the flame?

(i)

(ii)

(iii)

(iv)

Answer:

Question: 16

Which of the following sequences contain atomic numbers of only representative elements?

(i)

(ii)

(iii)

(iv)

Answer:

Question: 17.

Which of the following elements will gain one electron more readily in comparison to other elements of their group?

(i)

(ii)

(iii)

(iv)

Answer:

Question: 18

Which of the following statements are correct?

(i) Helium has the highest first ionisation enthalpy in the periodic table.

(ii) Chlorine has less negative electron gain enthalpy than fluorine.

(iii) Mercury and bromine are liquids at room temperature.

(iv) In any period, atomic radius of alkali metal is the highest.

Answer:

Question: 19

Which of the following sets contain only isoelectronic ions?

(i)

(ii)

(iii)

(iv)

Answer:

Question: 20

In which of the following options order of arrangement does not agree with the variation of property indicated against it?

(i)

(ii)

(iii)

(iv)

Answer:

Question: 21

Which of the following have no unit?

(i) Electronegativity

(ii) Electron gain enthalpy

(iii) Ionisation enthalpy

(iv) Metallic character

Answer:

Question: 22

Ionic radii vary in

(i) Inverse proportion to the effective nuclear charge.

(ii) Inverse proportion to the square of effective nuclear charge.

(iii) Direct proportion to the screening effect.

(iv) Direct proportion to the square of screening effect.

Answer:

Developed by: