An aqueous solution turns red litmus blue. Excess addition of which of the following solution would reverse the change?
- (a) Sodium hydroxide
- (b) Hydrochloric acid
- (c) Baking soda
- (d) Slaked lime
Acids, bases and indicators
Usually 1 marks a paper · mostly MCQs · asked in 1 of the last papers
Notes are being written
The board questions below are real and complete — they come from the CBSE papers themselves. The written notes for this topic are still being prepared.
Board questions on this topic
1 from the CBSE papers we hold — the exact wording the board used.