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JEE CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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Analyzing +4 | -1
Assertion (A): Among the two O−H\mathrm{O}-\mathrm{H} bonds in H2O\mathrm{H}_2 \mathrm{O} molecule, the energy required to break the first O−H\mathrm{O}-\mathrm{H} bond and the other O−H\mathrm{O}-\mathrm{H} bond is the same.
Reason (R): This is because the electronic environment around oxygen is the not same even after breakage of one O−H\mathrm{O}-\mathrm{H} bond.
View answer and explanation
Correct option: D
Assertion is incorrect; Reason is correct
Option A is correct because C2 has only two pi bonds and no sigma bond according to its molecular orbital configuration.

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The hybridization in sulphur dioxide is CO2\mathrm{C}{\mathrm{O}_2} has the same geometry as: (A)HgCl2,(B)NO2,(C)SnCl4,(D)C2H2\left( A \right)\mathrm{HgC}{\mathrm{l}_2},\left( B \right)\mathrm{N}{\mathrm{O}_2},\left( C \right)\mathrm{SnC}{\mathrm{l}_4},\left( D \right){\mathrm{C}_2}{\mathrm{H}_2} The pair of molecules forming strongest hydrogen bonds are Paramagnetism is shown by Which statement is correct? Assertion (A) : BF3{BF}_3 is a weaker Lewis acid than BCl3{BCl}_3.

Reason (R) : The planar BF3{BF}_3 molecule is stabilised to a greater extent than BCl3{BCl}_3 by B−Xπ{B}-X \pi-bonding.
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