TNPSC Group 4 · 2019
118.
Which of the following statements about bases is /are true?
I. Base is a substance which releases hydroxide ions when dissolved in water
II. They change blue litmus to red
III. Zinc reacts with sodium hydroxide to form Sodium Zincate with the liberation
of hydrogen gas
IV. They are colourless with phenolphthalein and pink with methyl orange
Answer:
A.
I and III