Numerical Problems in Organic Quantitative Analysis NEET Questions

Organic Chemistry - Purification and Characterization of Organic Compounds

Numerical Problems in Organic Quantitative Analysis MCQ Questions


1.
0.246 g of an organic compound on complete combustion gave 0.198 g of CO₂ and 0.1014 g of H₂O. The percentage of carbon in the compound is:
A.
21.95%
B.
43.90%
C.
10.97%
D.
32.92%
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ANSWER :
A. 21.95%
2.
0.246 g of an organic compound on complete combustion gave 0.198 g of CO₂ and 0.1014 g of H₂O. The percentage of hydrogen is:
A.
9.16%
B.
2.29%
C.
4.58%
D.
6.87%
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ANSWER :
C. 4.58%
3.
On complete combustion, 0.45 g of an organic compound produced 0.792 g of CO₂ and 0.405 g of H₂O. The percentage of carbon and hydrogen respectively are:
A.
10% and 48%
B.
48% and 10%
C.
24% and 5%
D.
48% and 24%
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ANSWER :
B. 48% and 10%
4.
0.20 g of an organic compound on combustion gave 0.147 g of CO₂ and 0.12 g of H₂O. The percentage of hydrogen is approximately:
A.
3.33%
B.
20.05%
C.
13.33%
D.
6.67%
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ANSWER :
D. 6.67%
5.
0.39 g of an organic compound on combustion produced 1.32 g of CO₂. The percentage of carbon in the compound is:
A.
46.15%
B.
92.31%
C.
23.07%
D.
61.54%
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ANSWER :
B. 92.31%
6.
An organic compound (0.30 g) on combustion produced 0.44 g CO₂ and 0.18 g H₂O. The percentages of C and H are:
A.
40%, 6.67%
B.
13.33%, 6.67%
C.
40%, 3.33%
D.
20%, 6.67%
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ANSWER :
A. 40%, 6.67%