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SSC CGL 2020 PYQ — Question 33

SSC CGL - 6th March 2020 Shift 3 • General Awareness • Q33

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Which of the following is used to remove the green colour from the glass?

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Correct answer: B

Explanation

The correct answer is option 2 i.e Manganese dioxide.

  • Manganese dioxide, which is black, is used to remove the green colour from the glass; in a very slow process, this is converted to sodium permanganate, a dark purple compound.