arvind kumar
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A student puts a drop of a solution of caustic soda first on a blue litmus paper and then on a red litmus paper. He would observe that

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CBSC Session 2022-23.
Sample Papers of Class 10th, Science.
NCERT Important Questions of Class 10th Science.
NCERT Science Solutions of Class 10th.
NCERT book extra Questions.
CBSC Board and other State board.

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  1. The red litmus paper turns blue and there is no change in the blue litmus paper.

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