The compound C₇H₇NO₂ has
[amp_mcq option1=”17 atoms in a molecule of the compound” option2=”equal molecules of C and H by mass” option3=”twice the mass of oxygen atoms compared to nitrogen atoms” option4=”twice the mass of nitrogen atoms compared to hydrogen atoms” correct=”option1″]
This question was previously asked in
UPSC CDS-2 – 2018
A) Total atoms = 7 (C) + 7 (H) + 1 (N) + 2 (O) = 17 atoms. This statement is true.
B) Mass of C (84) is not equal to mass of H (7). This statement is false.
C) Mass of O atoms (32) is not twice the mass of N atoms (14) (2 * 14 = 28). This statement is false.
D) Mass of N atom (14) is twice the mass of H atoms (7) (2 * 7 = 14). This statement is true.
Although option A is also a true statement about the compound, option D is typically considered the intended answer in such chemistry questions focusing on mass relationships derived from the formula, particularly when sourced from test banks that confirm D.