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जल में बने 2.05 M ऐसीटिक अम्ल विलयन का घनत्व 1.02 ग्राम/मिली है. इस विलयन की मोललता है-
A. 1.14 मोल `"किग्रा"""^(-1)`
B. 3.28 मोल `"किग्रा"""^(-1)`
C. 2.28 मोल `"किग्रा"""^(-1)`
D. 0.44 मोल `"किग्रा"""^(-1)`

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Correct Answer - C
मललता `(m)=(M)/(1000d-NM_(1))xx1000`
जहाँ M= मोलरता, `M_(1)=` अणुभार, d = घनत्व
`thereforem=(2.05)/((1000xx1.02)-(2.05xx60))xx1000 = 2.28` मोल `"किग्रा"""^(-1)`

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