For the reaction, products, when the concentration of A and B both were doubled, the rate of the reaction increased from to . When the concentration of A alone is doubled, the rate increased from t

Question

For the reaction,  products, when the concentration of A and B both were doubled, the rate of the reaction increased from  to . When the concentration of A alone is doubled, the rate increased from  to .

Which one of the following statements is correct?

Canvas Classes · Accepted Answer

Order w.r.t. A: When [A] doubles (B constant): rate doubles (0.3→0.6). So order w.r.t. A = 1.

Order w.r.t. B: When both doubled: rate increases 8× (0.3→2.4).

So order w.r.t. B = 2, total order = 1 + 2 = 3.

Checking options:
- (1) Order w.r.t. B is 2 ✓
- (2) Total order is 4 ✗ (it's 3)
- (3) Order w.r.t. A is 2 ✗ (it's 1)
- (4) Order w.r.t. B is 1 ✗

Answer: Option (1)

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