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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

Select the correct statement about elements of group 15th.

Options

  1. AThe order of stability of oxidation state for +3 is B i 3 + > S b 3 + > A s 3 + and for +5 is B i 5 + < S b 5
  2. BIn the case of nitrogen, all oxidation states from +1 to +4 tend to disproportionate in acid solution.
  3. CThere is considerable increase in covalent radius from N to P but from As to Bi only a small increase in coval
  4. DAll of these

Correct answer

D. All of these

Step-by-step solution

(i) This is due to the inert pair effect in the heavier p-block elements. (ii) 3 H N O 2 → H N O 3 + H 2 O + 2 N O (iii) This is due to the presence of completely filled d and l or f orbitals in heavier elements. Covalent radius l pm; N = 70, P = 110, As = 120, Bi = 150.

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