\(4.0\, u\) દળ ધરાવતો એક પરમાણ્વિક વાયુને એક અવાહક પાત્રમાં રાખવામાં આવે છે. માત્ર \(30\, m/s\) નાં વેગ થી ગતિ કરે છે. જે પાત્રને અચાનક અટકાવવામાં આવે તો વાયુનાં તાપમાનમાં ફેરફાર \(\frac{x}{3 R}\) \((R=\) વાયુ નિયતાંક) છે, \(x\) નું મૂલ્ય ............ છે.

A \(2500\)
B \(3600\)
C \(4900\)
D \(4200\)

Verified Solution

Answer & Solution

Correct Answer

(B) \(3600\)

Step-by-step Solution

Detailed explanation

Given that mass of gas is \(4 u\) hence its molar mass \(M\) is \(4 g / mol\) \(\therefore \frac{1}{2} mv ^{2}= n C _{ v } \Delta T\) \(\frac{1}{2} m \times(30)^{2}=\frac{ m }{ M } \times \frac{3 R }{2} \times \Delta T\) \(\therefore \Delta T =\frac{3600}{3 R }\)

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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