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Question

Consider the following statements.
S1 : The percentage of s-character in the orbital forming SS bonds and PP bonds in S8 and P4 molecules respectively are same.
S2 : In SF4 the bond angles, instead of being 90 and 180 are 89and177 respectively due to the repulsions between lone pair and bond pairs of electrons.
S3 : Aqueous H3PO4 is syrup (i.e more viscous than water).
S4 : SiO2 crystal maybe considered as giant molecule in which eight-membered rings are formed with alternate silicon and oxygen atoms.

Select the correct option.

A
S1&S4 are correct only
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B
S2,S3&S4 are correct only.
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C
S1,S2,S3&S4 are correct.
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D
S1,S2&S3 are correct only.
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Solution

The correct option is B S2,S3&S4 are correct only.
S8(sp3d2) has 16.67 % s-character and P4(sp3) has 25% S- character. S1 is incorrect.
SF4 has one lone pair of electrons on central S atom that cause lone pair-bond pair repulsion.
H3PO4 is a thick syrup.
SiO2 is the empirical formula, not the molecular formula of this substance. It is a network structure. Each silicon is connected to 4 oxygens, yes, but then these oxygens are attached to more silicon atoms in a network.

S2,S3,S4 are correct.
Option B is correct.

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