MCQ
How many metamers are possible for pentan-1-al?
- ATwo
- BFour
- CThree
- ✓Zero

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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