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2. structure of atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
Wavenumber for a radiation having $5800 \mathring A$ wavelength is $x \times 10 \mathrm{~cm}^{-1}$. The value of $x$ is. . . . . . . . 
  • ✓
    $1724$
  • B
    $1725$
  • C
    $1727$
  • D
    $1730$
✓

Answer

Correct option: A.
$1724$
a
$\bar{v} \text { (wave no.) }=\frac{1}{\lambda}=\frac{1}{5800 \times 10^{-8} \mathrm{~cm}}=17241$

OR

$1724 \times 10 \mathrm{~cm}^{-1} \Rightarrow \mathrm{x}=1724$

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