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Mdcat-past-papers Quiz

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3861. The thermal decomposition of nitrogen pentaoxide follows which one of the following order of reaction?



3862. One mole of a reactant reacts with a rate of 0.6 mol dm⁻³ s⁻¹. What is the rate constant of this reaction if reaction is first order?



3863. The unit of rate constant k is dm³ mol⁻¹ s⁻¹ for a chemical reaction. The order of reaction is:



3864. In a rate equation, rate = k[A][B], the reaction is:



3865. Forward reaction is the one that:



3866. For a first order reaction A → B, the rate constant is 0.0458 s⁻¹. Calculate rate of reaction if the concentration of reactant is 0.35 mol dm⁻³.



3867. A reaction is first order with respect to A and second order with respect to B. The rate equation is:



3868. When the concentration of A(g) doubles, the rate of reaction increases four folds. This means it is a:



3869. For which of the following orders of reaction, the rate of reaction is inversely proportional to the concentration?



3870. The sum of exponents in the rate equation gives:



3871. The rate of reaction:



3872. Unit of rate constant is same as the rate equation for:



3873. Rate of any reaction depends upon:



3874. What is NOT True about rate of reaction?



3875. 6CO₂ + 6H₂O ⟶ C₆H₁₂O₆ + 6O₂ (in presence of sunlight). Predict the order of reaction



3876. Which of the following mechanisms is consistent with the rate law Rate = k[NO]²[H₂]?



3877. If a reactant/product can absorb UV, visible or IR radiation, then the rate of reaction is best measured by:



3878. If rate constant k = 0.693 min⁻¹, what is the half-life for the 1st order reaction?



3879. Half-life of N₂O₅ at 0°C is 24 min. How long will it take for a sample to decay to 25% of its original concentration?



3880. Which order of reaction obeys the formula t₁⁄₂ = 1/ka?