Chemistry-Properties of d-block
NEET Chemistry Properties of d-block MCQ Question
Type: MCQ-numerical-Medium-Class 12
Given the decomposition reaction of potassium permanganate, 2KMnO4 → K2MnO4 + MnO2 + O2, how many moles of oxygen gas (O2) are produced from the complete decomposition of 0.8 moles of KMnO4?
A
0.2 moles
B
0.4 moles
C
0.8 moles
D
0 moles
Correct Answer
Option A
Detailed Explanation
The stoichiometry of the decomposition reaction shows that 2 moles of KMnO4 produce 1 mole of O2. Therefore, 0.8 moles of KMnO4 would produce 0.4/2 = 0.2 moles of O2.
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