Question

Consider the following statements.

S1 : The percentage of s-character in the orbital forming S – S bonds and P – P bonds in S8 and P4 molecules respectively are same.

**S2 :**In SF4 the bond angles, instead of being 90⁰ and 180⁰ are 89⁰ and 177⁰ respectively due to the repulsions between lone pair and bond pairs of electrons.

**S3 :**Aqueous H3PO4 is syrupy (i.e more viscous than water)

**S4 :**SiO2 crystal may be considered as giant molecule in which eight-membered rings are formed with alternate silicon and oxygen atoms.

Of these :

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

Answer 1

Answer: (C)

S1, S2, S3& S4 are correct.

Answer 2

(1) in S8 hybridisation of each S-atom is sp3 , in P4 hybridisation of each P-atom is sp3

(2) due to bp-lp repulsions

(3) Inter molecular H-bonding (PO43– groups are bonded by many H-bonds)

(4)