Class XI Chemistry Chemical Bonding and Molecular Structure 6

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Question 1

Correct sequence of repulsion among lone pair (LP), bond pair (BP) is

• ALP-LP>LP-BP> BP-BP
• BLP-BP>BP-BP>LP-LP
• CBP-BP>LP-LP>LP-BP
• DLP-LP>BP-BP>LP-BP

Question 2

The H-C-H, H-N-H and H-O-H bond angles (in degrees) in methane, ammonia and water are respectively, closest to

• A109.5, 104.5, 107.1
• B109.5, 107.1, 104.5
• C104.5, 107.1, 109.5
• D107.1, 104.5, 109.5

Question 3

The shape of SCl₄ is best described as a

• Asquare
• Btetrahedron
• Csquare pyramid
• Dsee-saw

Question 4

Which one of the following species does not exist under normal conditions ?

• A
• BBe₂
• CB₂
• DLi₂

Question 5

In the hydrocarbon

The state of hydridization of carbons 1,3 and 5 are in the following sequence

• Asp², sp, sp³
• Bsp, sp³, sp²
• Csp, sp², sp³
• Dsp³,sp², sp

Question 6

Choose incorrect option:
Antibonding molecular orbitals

• Ahave electron density which is in between the atoms
• BAntibonding molecular orbitals
• Corbitals are occupied by electrons prevents bonding
• Dall of these

Question 7

B has no non bonded lone pairs. It will have

• Aless energy , more stable
• Bmore energy, less stable
• Cless energy, less stable
• Dmore energy, more stable

Question 8

Which of the following is not a limitation of octet rule-

• Aformation of compounds with electron deficient atoms
• Bformation of super octet molecule
• Cinability to predict energy changes during bond formation
• DNone of the above

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