Magnetic Nature

Q.

Which of the following is paramagnetic?

1. 

2. 

3. 

4. 

Q.

Which of the following is diamagnetic?

1. Boron Moelcule

2. Oxyegen Molecule

3. N₂⁺

4. none

Q.

Given below a statement (S) and explanation (E) is given. Choose the appropriate answer:

Statement (S): $O_2$ is diamagnetic

Explanation (E): $O_2$ has two electrons in anti-bonding $\pi$ orbitals.

1. S is wrong but E correct

2. Both S and E are correct and E is correct explanation of S

3. Both S and E are correct but E is not correct explanation of S

4. S is correct but E is wrong

Q.

Which among the following pairs are paramagnetic?

1. dioxygen and dinitrogen

2. dioxygen and CO

3. dioxygen and NO

4. CO and NO

Q.

Oxygen molecule is paramagnetic because

1. Bonding electrons are more than antibonding electrons

2. Contains unpaired electrons

3. Bonding electrons are less than antibonding electrons

4. Bonding electrons are equal to antibonding electrons

Q. Which of the following is the incorrect trend of the property mentioned against it?

1. $H_2>H_2^{+}>H{e}_2$ [bond energy]
2. $O_2^{2-}>O_2>O_2^{2+}$ [Magnetic moment]
3. $N{O}^{-}>NO>N{O}^{+}$ [bond length]
4. $N{O}_2^{+}>N{O}_2>N{O}_2^{-}$ [bond angle]

Q. Which of the following species is not paramagnetic?

1. $CO$
2. $B_2$
3. $NO$
4. $O_2$

Q. Among $H_2,H_2^{+},L{i}_2,B{e}_2,B_2,C_2,O_2^{-},$, $N_2$, and$F_2$ the number of diamagnetic species are: (Atomic numbers: $H=1,He=2,Li=3,Be=4,B=5,C=6,N=7,O=8,F=9)$

Q. Which of the following molecules is paramagnetic?

1. $O_2^{-}$
2. $C{N}^{-}$
3. $CO$
4. $N{O}^{+}$

Q. Which of the following statements is incorrect?

1. The peroxide ion has a bond order of one
2. The peroxide ion has a weaker bond than the oxygen molecule
3. The peroxide ion as well as the dioxygen molecule are paramagnetic
4. The bond length of peroxide ion is greater than that of the dioxygen molecule