QJEEM23Ch95bb: JEE Main 2023 Chemistry - Class 12 JEEM23Ch95bb Solution: Uracil is a base present in RNA with the following structure. % …

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Uracil is a base present in RNA with the following structure. % of N in uracil is ___________

JEE Main 2023 (Online) 24th January Morning Shift Chemistry - Biomolecules Question 45 English

Given:

Molar mass N = 14 g mol $^{- 1}$

O = 16 g mol $^{- 1}$

C = 12 g mol $^{- 1}$

H = 1 g mol $^{- 1}$

Accepted Answer

Uracil is

\mathrm{C}_{4} \mathrm{H}_{4} \mathrm{~N}_{2} \mathrm{O}_{2}

Mol. Wt of

\mathrm{C}_{4} \mathrm{H}_{4} \mathrm{~N}_{2} \mathrm{O}_{2}

= 112

\%

by mass of

N=\frac{14 \times 2}{112} \times 100

= 25 %

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