NEET Chemistry Rate of Reaction MCQ Question
For a zero-order reaction with an initial concentration [R]₀ of 0.5 mol L⁻¹ and a rate constant k of 0.1 mol L⁻¹ s⁻¹, what will be the concentration of R after 2 seconds?
0.3 mol L⁻¹
0.7 mol L⁻¹
0.1 mol L⁻¹
0.5 mol L⁻¹
Correct Answer
Detailed Explanation
For a zero-order reaction, concentration [R] after time t is calculated using [R] = [R]₀ - kt. Substituting [R]₀ = 0.5 mol L⁻¹, k = 0.1 mol L⁻¹ s⁻¹, and t = 2 s, we get [R] = 0.5 - (0.1 × 2) = 0.3 mol L⁻¹.
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