KVPY2011Chemistryd and f Block Elements
MnO ₄ ⁻ oxidizes (i) oxalate ion in acidic medium at 333 ~K and and (ii) HCl. For balanced chemical equations, the ratios [ MnO ₄⁻: C ₂ O ₄ ²⁻ ] in (i) and [ MnO ₄⁻: HCl ] in (ii), respectively, are-
Options
- A1: 5 and 2: 5
- B2: 5 and 1: 8
- C2: 5 and 1: 5
- D5: 2 and 1: 8
Correct answer
B. 2: 5 and 1: 8
Step-by-step solution
16 H ⁺+2 MnO ₄⁻+5 C ₂ O ₄²⁻ 2 Mn ⁺²+10 CO ₂+8 H ₂ O MnO ₄⁻: C ₂ O ₄ ²⁻=2: 52 KMnO ₄+16 HCl 2 KCl +2 MnCl ₂+5 Cl ₂+8 H ₂ O MnO ₄⁻: HCl =2: 16=1: 8