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Which species is not present in the Lass...

Which species is not present in the Lassaigne's extract? N O 3- C N- C N S Θ S 2 −

A

`NO_3^(Theta)`

B

`Coverset(Theta)N`

C

`CNS^(Theta)`

D

`S^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
A
In Lassaigne.s test, N is converted to `Coverset(Theta)N` ion, S is converted to `S^(2-)` ion, N and S are converted to `CNS^(Theta)` ions, halogens are converted to halide ion `(X^(Theta))` , P is converted to `PO_4^(3-)` ions. So, `NO_(3)^(Theta)` is never present in Lassaigne.s extract.
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