Write the formula of carbon tetrachloride . Also name the elements presents in them.

Explanation

The dichromate ion `(Cr_2O_7^(2-))` and chromate ion `(CrO_4^(2-))` exist in equilibrium with each other at a pH of about 4. They are Interconvertible by changing the pH. The chromate ion on addition of acid changes into dichromate ion while the dichromate ions on addition of alkali change into chromate ion.
`underset("Chromate (Yellow)")(2CrO_4^(2-)) + 2H^(+) underset("Alkali")overset("Acid")(