\(X\) અને \(Y\) વચ્ચેની પ્રક્રિયા \(X\) ના સાપેક્ષમાં પ્રથમ ક્રમ અને \(Y\) ના સાપેક્ષમાં શૂન્ય ક્રમ ની છે.

પ્રયોગ	\(\frac{[ X ]}{ mol \;L ^{-1}}\)	\(\frac{[ Y ]}{ mol\; L ^{-1}}\)	\(\frac{\text { Initial rate }}{ mol\; L ^{-1}\; min ^{-1}}\)
\(I\)	\(0.1\)	\(0.1\)	\(2 \times 10^{-3}\)
\(II\)	\(.2\)	\(0.2\)	\(4 \times 10^{-3}\)
\(III\)	\(0.4\)	\(0.4\)	\(M \times 10^{-3}\)
\(IV\)	\(0.1\)	\(0.2\)	\(2 \times 10^{-3}\)

\(M\) મૂલ્યનો સંખ્યાત્મક ગુણોત્તર \(........\) છે. (નજીકનો પૂર્ણાંક)

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.