Redox Reactions PYQs Set 5 (PDF)

Set 5 of 5 · Questions 121-123 of 123

In the print window choose “Save as PDF”. The file prints without a web address or date line.

Mere Teacher · Previous Year Questions NEET Chemistry · Redox Reactions · Set 5 (Q121-123)
Scan or visit mereteacher.com for free PYQ practice, timed CBT tests, step-by-step solutions and BroBot AI. Answers and solutions are free with a sign-up.
121. $Which of the following are disproportionation reactions?(A) Cl_{2} + 2 NaOH \to NaCl + NaOCl + H_{2} O (B) H_{2} O_{2} \to 2 H_{2} O + O_{2} (C) 2 KMnO_{4} \to K_{2} MnO_{4} + MnO_{2} + O_{2} (D) 3 MnO_{4}^{2 -} + 4 H^{+} \to 2 MnO_{4}^{-} + MnO_{2} + 2 H_{2} O$ (1) $A, B, C only$ (2) $A, B, D only$ (3) $A, C only$ (4) $A, B, C, D$ 122. $In polythionic acid, H_{2} SxO6(x = 3 to 5) the oxidation state(s) of sulphur is/are :$ (1) $+5 only$ (2) $+6 only$ (3) $+3 and +5 only$ (4) $0 and +5 only$ 123. $C u^{2 +} salt reacts with potassium iodide to give$ (1) $C u_{2} I_{2}$ (2) $C u_{2} I_{3}$ (3) $C u I$ (4) $C u (I_{3})_{2}$