MCQ
Blood cells will remain as such in
- AHypertonic solution
- BHypotonic solution
- ✓Isotonic solution
- DNone of these
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If dilute $HCl$ is added to an aqueous solution of ${H_2}S$ without any change in temperature
$(A)$ 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