10 moles of A were present in a system initially, and 10 moles are added to it,

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Question

10 moles of A were present in a system initially, and 10 moles are added to it, it follows the reaction 4A -> B, what are number of moles of B produced?

Options:

A . 5

B . 10

C . 15

D . 20

Answer: Option A
Answer: (a).5

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