MCQ
The shape of ethylene molecule is
- ASquare planar
- BFuran
- ✓Trigonal planar
- DTetrahedral
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$(I)$ As wavelength decreases, the lines in the series converge
$(II)$ The integer $n_{1}$ is equal to $2$
$(III)$ The lines of longest wavelength corresponds to $\mathrm{n}_{2}=3$
$(IV)$ The ionization energy of hydrogen can be calculated from wave number of these lines