Which of the following orders is/are incorrect ?

Question

Which of the following orders is/are incorrect ?

Which of the following orders is/are incorrect ?
A. `H_3PO_4 gt H_3PO_3 gt H_3PO_2`(reducing character)
B. `N_2O lt NO lt N_2O_3 lt N_2O_5` (oxidation state on nitrogen atom)
C. `NH_3 gt PH_3 gtAsH_3 gt SbH_3`(basicity)
D. `SbH_3 gt NH_3 gt AsH_3 gt PH_3` (reducing character )

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - A,D
(A)As number of reducing hydrogen increases , the reducing character also increases . In `H_3PO_4` there is no reducing hydrogen so it should be least reducing . Correct order is `H_3PO_2 gt H_3PO_3 gt H_3PO_4`
(B)+1 lt +2 lt +3 lt +5
(C )down the group the availability of lone pair of electrons decreses as they are present in more concentrated s-orbital
(D)As down the group bond energy decreases, the removal of H becomes easier. so correct order is `SbH_3 gt AsH_3 gt PH_3 gt NH_3`