A colourless salt gives violet colour to Bunsen flame and also turns moistured litmus paper blue. It is
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a
Na2CO3
b
KNO3
c
K2CO3
d
CuOH2
answer is C.
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Detailed Solution
Violet colour to flame is characteristic of potassium. Also aqueous solution of K2CO3 is alkaline.KNO3 also gives violet colour but is neutral to litmus