GATE XL 2020 Paper 1 — page 6

Questions 16–18 of 125. Imported answers require review unless explicitly marked reviewed.

The correct order of the first ionization energies of He, B, N and O in their corresponding ground state is

Your answerChoose one option.

He > N > O > B

O > N > B > He

He > B > N > O

N > O > B > He

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Based on the molecular orbital theory, which one of the following statements with respect to N

, N

, O

and O

is correct?

Your answerChoose one option.

Bond orders of N

and O

are higher than their corresponding cations.

Bond energy of N

is higher than that of N

, whereas bond energy of O

is lower than that of O

The unpaired electrons in N

and O

are present in

and

orbitals, respectively.

The bond in N

is shorter than that in N

, whereas bond in O

is shorter than that in O

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which one of the following statements is incorrect about the diborane molecule?

Your answerChoose one option.

B-H

bond is a 2-centre-2-electron bond (H

: terminal hydrogen).

B-H

bond is a 3-centre-2-electron bond (H

: bridge hydrogen).

The bond angle H

is 122° (H

: terminal hydrogen).

The B-H

bond distance is longer than B-H

bond distance (H

: terminal hydrogen, H

: bridge hydrogen).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

2020 · Paper 1

Question 6

Question 7

Question 8