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Friday, 9 October

NEET UG 2019 · Chemistry · Question 50

NEET 2019 Chemistry, question 50

Question 50 of the NEET 2019 paper (code P1) is a Chemistry question from Redox Reactions. Its idea, Disproportionation Reactions, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q50 · Chemistry

Which of the following reactions are disproportionation reaction ?

(a) 2Cu+→Cu2++Cu02Cu^+ \to Cu^{2+} + Cu^0

(b) 3MnO42−+4H+→2MnO4−+MnO2+2H2O3MnO_4^{2-} + 4H^+ \to 2MnO_4^- + MnO_2 + 2H_2O

(c) 2KMnO4→ΔK2MnO4+MnO2+O22KMnO_4 \xrightarrow{\Delta} K_2MnO_4 + MnO_2 + O_2

(d) 2MnO4−+3Mn2++2H2O→5MnO2+4H⊕2MnO_4^- + 3Mn^{2+} + 2H_2O \to 5MnO_2 + 4H^{\oplus}

Select the correct option from the following :

  1. 1(a) and (b) onlyOfficial answer
  2. 2(a), (b) and (c)
  3. 3(a), (c) and (d)
  4. 4(a) and (d) only

Official answer: option 1 · NTA final answer key

Same idea

The only question on Disproportionation Reactions

No other NEET paper from 2017–2026 tested this exact idea.

Disproportionation Reactions: every question and how it was framed

The chapter

Redox Reactions in ten years of NEET

10 questions from 2017–2026, asked in 8 of 10 papers, about 1.0 a paper. Redox Reactions alone had 10.

Chapter analysisStudy this chapterPractise this chapter

Redox Reactions: questions per paper

0240’172’181’191’201’210’221’231’241’252’26