Q.

Which salt gives crimson red colour in flame

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a

SrCl2

b

CaCl2

c

NaCl

d

MgCl2

answer is A.

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Detailed Solution

except Beryellium & Magnesium, the compound of alkaline earth metals impart coloration to Bunsen flame. The energy of the flame is sufficient enough to excite the valence electrons to higher orbitals. Brick red for Ca+2, crimson red for Sr+2 ,apple green for Ba+2.
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