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Q.

For a reaction : $2 A (g) ⟶ B (g) + 3 C (g)$ rat constant of disappearance of A Is $10^{- 3} M \sec^{- 1}$ . If initially $2 M$ of A is taken then what will be concentration of C after 5 minutes?

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a

$0.3 M$

b

$0.9 M$

c

$1.5 \times 10^{- 2} M$

d

$0.45 M$

answer is C.

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Detailed Solution

$2 A (g) ⟶ B (g) + 3 C (g)$

$a - x \frac{x}{2} \frac{3 x}{2}$

Zero order reaction

$x = 10^{- 3} \times 5 \times 60 = 0.3$

$[C] = 3 \times \frac{0.3}{2}$

$= 0.45 M$

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