The number of moles of KMnO4 reacts with - CUETMOCK

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Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: D and F Block Elements

Question:

The number of moles of KMnO₄ reacts with H₂O₂ is equal to that of which of the following?

Options:

4s electrons in Ca (Z=20)

2p electrons in Ne (Z=10)

3d electrons in Cr (Z=24)

4f electrons in La (Z=57)

Correct Answer:

4s electrons in Ca (Z=20)

Explanation:

2 K M n O_{4} + 5 H_{2} O_{2} + 3 H_{2} S O_{4} \to 5 O_{2} + 2 M n S O_{4} + K_{2} S O_{4} + 8 H_{2} O

2 moles of K M n O_{4}

_{s electrons in Ca (Z=20) = 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2}

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