classification of elements, chemical bonding, periodicity in properties & physical transformation - Category wise Question and Answer Practice Test with Solutions

Question : 11

To which block is related an element having electronic configuration 1s²  2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹ in the periodic table–

a) p–block

b) d–block

c) s–block

d) f–block

Question : 12 [IAS Prelim]

Consider the following statements with reference to the periodic table of chemical elements:

1. Ionisation potential gradually decreases along a period
2. In a group of elements, electron affinity decreases as the atomic weight increases
3. In a given period, electronegativity decreases as the atomic number increases

a) 2 only

b) 1 and 3

c) 1 only

d) 2 and 3

Question : 13

The noble gases are unreactive because

a) they have a full outer shell of electrons

b) they have a half outer shell of neutrons

c) they react with sodium

d) they are too thin

Question : 14

Which of the following elements does not lose an electron easily?

a) F

b) Mg

c) Na

d) Al

Question : 15

Which of the following are correct statements?

1. The canonical structures have no real existence
2. Every $AB_5$ molecule does in fact have square pyramidal structure
3. Multiple bonds are always shorter than corresponding single bonds
4. The electron-deficient molecules can act as Lewis acids

a) 2, 3 and 4

b) 1, 2 and 3

c) 1, 3 and 4

d) 1, 2 and 4