Carbon has the highest Ionization energy
THE COMPOUND IS: ethnoxybutane
<u>Answer:</u> The correct answer is Option d.
<u>Explanation:</u>
An indicator is defined as the substance which shows the presence of acid or a base in a solution. They change their color accordingly.
Acid-base indicators are usually weak acids or weak bases. They change their color in the solution with change in the pH.
<u>For Example:</u> Phenolphthalein is an acid-base indicator which remains colorless in acidic solution and changes its color to pink when added to basic solution.
Hence, the correct answer is Option d.