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Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsRate of Reactions/Rate LawEasy2 minPYQ_2020

ChemistryEasysingle choice

The reaction $A (g) \to B (g) + 2 C (g)$ is a first-order reaction with a rate constant of 2.303 x 10^-3s^-1. Starting with 0.1 moles of 'A' in a 2 litre vessel, find the concentration of A after 301 sec when the reaction is allowed to take place at constant pressure at 300 K.

Options:

Answer:

Solution:

$t_{1 / 2} = \frac{0.693}{2.303 \times 1 0^{- 3}} = \frac{693}{2.303} = 301 sec$

initial concentration = moles of A/volume = 0.1/2 = 0.05 mole/L
i.e., after t₁_/2, no. of moles of 'A' reacted is half the initial moles.

Final conc. of [A] = 0.05/2 = 0.025 M

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Chemical KineticsSubtopic:Rate of Reactions/Rate Law

⏱ 2mℹ️ Source: PYQ_2020

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