પ્રથમ ક્રમની પ્રક્રિયા માટે વેગઅચળાંક \(60 s^{-1}\) છે. પ્રક્રિયક પ્રારંભિક સાંદ્રતાથી તેના \(\frac{1}{16}\) ભાગના મૂલ્ય જેટલી સાંદ્રતા ઘટીને થવા માટે કેટલી સેકન્ડ લાગશે ?

A \(2.3 \times 10^{-2}\)
B \(9.5 \times 10^{-2}\)
C \(4.6 \times 10^{-2}\)
D \(6.9 \times 10^{-2}\)

Verified Solution

Answer & Solution

Correct Answer

(C) \(4.6 \times 10^{-2}\)

Step-by-step Solution

Detailed explanation

C
\(k=\frac{2.303}{t} \\log \frac{[R]_0}{[R]}\)\(\therefore t=\frac{2.303}{K}\) \(\log \frac{1}{\frac{1}{16}}\)
\(\therefore t=\frac{2.303}{60}\) \(log 16\)
\(\therefore t=\frac{2.303}{60}(1.2041)\)
\(\therefore a t=4.6 \times 10^{-2} Sec\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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