Neco 2022 Mathematics Question 41

Practice objective / multiple choice question 41 from the 2022 Neco Mathematics examination.

Neco 2022 Mathematics Objective / Multiple Choice Medium Difficulty
Question 41 NECO • 2022 • MATHEMATICS • objective

The time \(t\) (in minutes) taken for a chemical reaction to complete varies directly as the square of the concentration \(c\) (in mol/L) and inversely as the temperature \(T\) (in Kelvin). When \(c = 0.2\) mol/L and \(T = 300\) K, the reaction takes 45 minutes. Find the time required when the concentration is \(0.3\) mol/L and the temperature is \(350\) K. Also, determine the percentage increase in time compared to the original 45 minutes.

Answer Options

A. 78.5 minutes (to 1 d.p.) and 74.4% increase
B. 84.0 minutes (to 1 d.p.) and 86.7% increase
C. 92.3 minutes (to 1 d.p.) and 105.1% increase
Correct Answer D. 86.8 minutes (to 1 d.p.) and 92.9% increase
Correct Answer
D
Correct Option:
86.8 minutes (to 1 d.p.) and 92.9% increase

About This Question

This is Neco 2022 Mathematics Question 41. It is one of the objective questions from the 2022 Neco Mathematics examination.

Difficulty level: Medium .

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