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JEE Advance - Chemistry (2018 - Paper 2 Offline - No. 4)

The total number of compounds having at least one bridging oxo group among the molecules given below is _________.

$${N_2}{O_3},{N_2}{O_5},$$ $${P_4}{O_6},{P_4}{O_7},$$ $${H_4}{P_2}{O_5},{H_5}{P_3}{O_{10}},$$ $${H_2}{S_2}{O_3},{H_2}{S_2}{O_5}$$
Answer
6

Explanation

The structures of various molecules given in problem are discussed below -

1. N2O3 It is the tautomeric mixture of following two structures -

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 1

Conclusion 1 bridging oxo group is present in the compound.

2. N2O5 It has following structure.

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 2

Conclusion 1 bridging oxo group is present in the compound.

where, pi = initial pressure, pt = total pressure, y = number of gaseous products per mole of reactant

3. P4O6

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 3

Conclusion 6 bridging oxo groups are present in the compound.

4. P4O7

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 4

Conclusion 6 bridging oxo groups are present in the compound.

5. H4P2O5

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 5

Conclusion 1 bridging oxo group is present in the compound.

6. H5P3O10

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 6

Conclusion 2 bridging oxo groups are present in the compound.

7. H2S2O3

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 7

Conclusion This compound does not contain any bridging oxo group.

8. H2S2O5

JEE Advanced 2018 Paper 2 Offline Chemistry - p-Block Elements Question 54 English Explanation 8

Conclusion This compound also does not contain any bridging oxo group.

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