What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)? (a) Methyl orange (b) litmus (c) red cabbage extract

<ul>
<li>When methyl orange is added to a base it turns colour into yellow</li>
<li>Litmus paper changes into blue when dipped in base It changes colour from red to blue as the solution is alkali</li>
<li>Red cabbage extract turns into green colour when added to a base</li>
</ul>