Chemistry - Complete Pblock- Question with Solution | TestHub
ChemistryComplete Pblock-p-Block 17,18Medium2 minQB
ChemistryMediumsingle choice
The unbalanced chemical reactions given in List-I show a missing reagent (?) which is provided in List-II. Match List-I with List-II and select the correct answer using the code given below the lists :
List-I | List-II |
|---|---|
(P) Na₂S₂O₃ + ? → Na₂S₄O₆ + NaI | (1) PH₃ |
(Q) KI + ? + H₂O → I₂ + KOH + ... | (2) H₂ |
(R) CuSO₄ + ? → Cu₃P₂ + H₂SO₄ | (3) I₂ |
(S) XeF₂ + ? → Xe + HF | (4) O₃ |
| (5) H₂O₂ |
The correct option is :
Options:
Answer:
A
Solution:
(P) 2Na₂S₂O₃ + I₂ → Na₂S₄O₆ + 2NaI (tetrathionate; chlorine would oxidise thiosulphate all the way to sulphate); (Q) 2KI + O₃ + H₂O → I₂ + 2KOH + O₂; (R) 3CuSO₄ + 2PH₃ → Cu₃P₂ + 3H₂SO₄; (S) XeF₂ + H₂ → Xe + 2HF AND XeF₂ + H₂O₂ → Xe + 2HF + O₂. Hence P → 3, Q → 4, R → 1, S → 2,5.
Stream:JEESubject:ChemistryTopic:Complete Pblock-Subtopic:p-Block 17,18
⏱ 2mℹ️ Source: QB
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