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Ions of an element of group 1 participat...

Ions of an element of group 1 participate in the transmission of nerve signals and transport of sugars and aminoacids into cells. This element imparts yellow colour to the flame in flame test and forms an oxide and a peroxide with oxygen. Identify the element and write chemical reaction to show the formation of its peroxide. Why does the element impart colour to the flame?

Text Solution

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Since the alkali metal imparts yellow colour in the flame test , it must be sodium .
It reacts with `O_(2)` to form a mixture of mainly sodium peroxide `(Na_(2)O_(2))` with a small amount of sodium oxide `(Na_(2)O)`
` 4 Na + O_(2) overset(Delta) (to) 2 Na_(2)O , 2 Na_(2)O + O_(2) overset(Delta)(to) 2 Na_(2)O_(2)`
or `" " 2Na + O_(2) overset(Delta)(to) Na_(2)O_(2)`
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