Q82 · CSIR-NET Chemistry, December 2019

Paper: CSIR-NET December 2019 · Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Marks: 2 · Difficulty: Easy

The correct statements for dithionite and dithionate anions from the following are (A) both have S-S bond (B) both are dianionic (C) oxidation state of sulphur is +3 and +5, respectively (D) sulphur in dithionate has lone pair of electrons
(a)A, B and C
(b)A, B and D
(c)B, C and D
(d)A and B only
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Dithionite [O₂S–SO₂]²⁻ (S +3) and dithionate [O₃S–SO₃]²⁻ (S +5) both have an S–S bond and a 2− charge. S in dithionate carries no lone pair. A, B and C (a).

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