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Question

Which of the following is true about a base?

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

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.

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