MPSC Rajyaseva 2020 GS Paper 1 — Question 65

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खालीलपैकी कोणत्या रासायनिक अभिक्रिया ऑक्सिडिकरण-क्षपण या प्रकारात मोडतात ? (a) 2Mg + O2 → 2MgO (b) MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 (c) 2Na + Cl2 → 2NaCl (d) 2NaBr + H2O2 → 2NaOH + Br2 Which of the following are Oxidation-reduction reactions ? (a) 2Mg + O2 → 2MgO (b) MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 (c) 2Na + Cl2 → 2NaCl (d) 2NaBr + H2O2 → 2NaOH + Br2

(a)2Mg + O2 → 2MgO

(b)MnO2 + 4HCl → MnCl2 + 2H2O + Cl2

(d)2NaBr + H2O2 → 2NaOH + Br2

1)फक्त (a), (d) / Only (a), (d)

2)फक्त (b), (c) / Only (b), (c)

3)फक्त (a), (b) / Only (a), (b)

4)वरील सर्व / All of the above✓ Correct

All given chemical reactions involve simultaneous oxidation and reduction (redox reactions) where electrons or oxygen/hydrogen are transferred.

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