Question

Which of the following is true about a base?

• A. It turns blue litmus red
• B. It turns red cabbage extract green
• C. It turns red litmus blue
• D. It turns red cabbage extract pink

Answer 1

Answer: (B), (C)

The correct options are
B It turns red cabbage extract green
C It turns red litmus blue

Extract of red cabbage and litmus paper are indicators that change colour when a base or an acid reacts with them. A base turns red litmus blue but has no effect on blue litmus. A base also turns the extract of the red cabbage to green colour.