Which of the following statements about bases is/are true?
I. Base is a substance that releases hydroxide ions when dissolved in water
II. They change blue litmus to red
III. Zinc reacts with sodium hydroxide to form Sodium Zineate with the liberation of hydrogen gas
IV. They are colorless with phenolphthalein and pink with methyl orange
1
I and III
2
II only
3
III and IV
4
IV and II
5
Question Not Attempted