How many of following metals impart a characteristic colour to the Bunsen flame ? `(i) Na " " (ii) Li " " (iii) K " " (iv) Ba` `(v) Sr " " (vi) Mg " "
How many of following metals impart a characteristic colour to the Bunsen flame ?
`(i) Na " " (ii) Li " " (iii) K " " (iv) Ba`
`(v) Sr " " (vi) Mg " " (vii) Rb " " (viii) Cs`
(ix) `Be " " (x )Ca " " (x i)Cu`
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