Question

x and y are tested with Universal Indicator.
x turns orange v turns Red, which is stronger acid?

Answer 1

Universal indicator is an indicator paper used to test for acids and alkalis.

It is a mixture for different dyes that change color depending on $pH$.

In the given question ${}^{\prime }{x}^{\prime }$ turns orange and ${}^{\prime }{y}^{\prime }$ turns red. $Y$ is the stronger acid because it has low $pH$.

$[$ Universal indicator shows red at a $pH$ of $0-1$, and orange at $pH$ of $\sim 1-3]$