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Physics
Multiple Choice Question with Only One Choice Correct When light emitted by a white hot solid is passed through a sodium flame, the spectrum of the emergent light will show (a) the D₁ and D₂ bright yellow lines of sodium (b) two dark lines in the yellow region (c) all colours from violet to red (d) no colours at all
Chemistry
True or False : Pauli exclusion principle is followed by ferminons which have half-integral spins.
Mathematics
The greatest value of the function y = sin² x - 20 cos x + 1 is _______ .