WBJEE · Chemistry · Some Basic Concepts of Chemistry
An organic compound made of \(\mathrm{C}, \mathrm{H}\) and \(\mathrm{N}\) contains \(20 \%\) nitrogen. Its molecular weight is :
- A \(70\)
- B \(140\)
- C \(100\)
- D \(65\)
Answer & Solution
Correct Answer
(A) \(70\)
Step-by-step Solution
Detailed explanation
Nitrogen at. wt. \(=14\) in a molecule minimum one atom of \(\mathrm{N}\) is present i.e., \(\begin{array}{rlr}20 \% & \equiv 14 & \text { Molecular weight }=70 \\ 100 \% & \equiv 14 \times 5=70 & \end{array}\)
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