MCQ
Propane is obtained from propene, by which of the following methods
- AWurtz reaction
- BDehydrogenation
- CFrankland reaction
- ✓Catalytic hydrogenation
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$(A)$ Line emission spectra are used to study the electronic structure
$(B)$ The emission spectra of atoms in the gas phase show a continuous spread of wavelength from red to violet
$(C)$ An absorption spectrum is like the photographic negative of an emission spectrum
$(D)$ The element helium was discovered in the sun by spectroscopic method