Which of the following is true about bases?

It turns blue litmus red

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It turns red cabbage extract green

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It has no effect on red cabbage extract

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It has no effect on red litmus

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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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