Which of the following is paramagnetic ?

• N₂

• C₂

• N₂⁺

• O₂^2-

Assertion : SeCl₄ does not have a tetrahedral structure.

Reason : Se in SeCl₄ has two lone pairs.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Intermolecular hydrogen bonding is strongest in :

• C₂H₅OH

• HF

• H₂O

• CH₃COCH₃

Hybridization present in ClF₃ is :

• sp²

• sp³

• dsp²

• sp³d

Number of electrons surrounding Kr in KrF₂ is :

• 10

• 6

• 4

• 8

H - I - O bond angle in H₂O₂ :

• 90^o

• 180^o

• 109.5^o

• 94.8^o

Assertion : Molecular nitrogen is less reactive than molecular oxygen.

Reason : The bond length of N₂ is shorter than that of oxygen.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Electron deficient molecule is :

• CCl₄

• PCl₅

• BF₃

• SF₆

569.

Number of unpaired electrons in O₂ molecule is :

• zero

• one

• two

• four

Bond order in benzene is :

• 1

• 2

• 1.5

• none of these