12th Grade > Chemistry
CHEMICAL BONDING MCQs
Total Questions : 30
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Answer: Option A. -> NH3> PH3> AsH3> SbH3
:
A
NH3 has sp3 hybridisation with bond angle 1070 where as PH3,AsH3,SbH3 has pure orbitals overlapping with bond angle around 900
:
A
NH3 has sp3 hybridisation with bond angle 1070 where as PH3,AsH3,SbH3 has pure orbitals overlapping with bond angle around 900
Answer: Option B. -> BeCl2> SO2
:
B
BeCl2 is linear with zero dipole moment & SO2 is angular with dipole moment
:
B
BeCl2 is linear with zero dipole moment & SO2 is angular with dipole moment
Answer: Option B. -> C2(CN)4
:
B
C2(CN)4 molecule contains 9σ and 9 πbonds.
(CN)2−C=C−(CN)2
Each C bonded to N would have 2 pi and 1 sigma bond. So that is a total of 8 pi bonds. There is one pi bond between -C=C- in the middle.
The rest of the bonds are all sigma bonds - 1 each between C and N making a total of 4, 1 between the central carbon atoms, and 1 each between the central carbons and the C from CN, making a total of 9 sigma bonds.
:
B
C2(CN)4 molecule contains 9σ and 9 πbonds.
(CN)2−C=C−(CN)2
Each C bonded to N would have 2 pi and 1 sigma bond. So that is a total of 8 pi bonds. There is one pi bond between -C=C- in the middle.
The rest of the bonds are all sigma bonds - 1 each between C and N making a total of 4, 1 between the central carbon atoms, and 1 each between the central carbons and the C from CN, making a total of 9 sigma bonds.
Answer: Option D. -> Increases progressively
:
D
From 109.28 to 120 to 180 degrees.
:
D
From 109.28 to 120 to 180 degrees.
Answer: Option A. -> H-O......H
:
A
Oxygen is more electronegative than N, S
:
A
Oxygen is more electronegative than N, S
Answer: Option C. -> 109o
:
C
BH−4 is tetrahedral
:
C
BH−4 is tetrahedral
Answer: Option D. -> Either of these depending on the number of lone pairs of electrons on M
:
D
Shape depends on number of lone pair electrons
:
D
Shape depends on number of lone pair electrons