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Question

Which of the following is true about bases?


  1. It turns blue litmus red
  2. It turns red cabbage extract green
  3. It has no effect on red cabbage extract
  4. It has no effect on red litmus


Solution

The correct option is B It turns red cabbage extract green

Extract of red cabbage and litmus paper are indicators that change color 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.

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