Asked: U.P. Lower Sub. (Pre) 2009medium Level
QUESTION STATEMENT:द्विभाषी / Bilingual
यूरिया में नाइट्रोजन का प्रतिशत (%) होता है-
The percentage (%) of nitrogen in urea is:
SELECT CORRECT OPTION:
A
30%
B
25%
C
47%
Correct
D
60%
Official Solution & Explanation:
Correct Answer: Option C(47%)
यूरिया [$CO(NH_2)_2$] का अणुभार 60 होता है, जिसमें नाइट्रोजन के दो परमाणु ($28\text{ g}$) उपस्थित होते हैं। अतः नाइट्रोजन का प्रतिशत $\frac{28}{60} \times 100 \approx 46.66\%$ (लगभग 46-47%) होता है।
Urea ($CH_4N_2O$, molar mass 60 g/mol) contains approximately 46.67% nitrogen by weight.
Subject: General Science•Topic: Fertilizers•Subtopic: Fertilizers
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