NEET Practice Questions (MCQs) with Answers & Solutions

C

O

B

F

$∆$EN=1.6-2.2

$∆$DEN=1.7-2.2

$∆$EN=0.8-1.1

$∆$EN=0-1.6

Electronegativity, radius and Z*

resonance energy of molecule, Ionisation potential and electron affinity

Bond polarity, diagonal relationship and periodicity

None of the above

[Rn] 5f³ 6d¹ 7s²

[Rn] 5f⁵ 6d¹ 7s²

[Rn] 5f² 6d¹ 7s²

None of the above

1.95 and 1.22

0.85 and 0.35

1 and 0.35

6.85 and 2.2

Endothermic

Endothermic for Mg, Be, N

Exothermic for Mg, Be, N and noble gases

Depends of electronic configuration

Poor shielding by 5f subshell

Extra ordinary decrement in Z_eff

Both of the above

Strong shielding by 5f subshell

111, 66, 77, 74, 88

74, 84, 111, 77,66

111, 88, 77, 74, 66

111, 66, 88, 77,74

Amphoteric elements

Four electron donor group

s-block

All of the above

15 proton in nucleus

13 proton in nucleus

11 proton in nucleus

Ionisation energy is NOT related to number of proton in nucleus