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Science · 2023 · 1 mark
CBSE 2023 · Region 1 · Set 1 · Q1
In the experimental setup given below, it is observed that on passing the gas produced in the reaction in the solution 'X' the solution 'X' first turns milky and then colourless.
The option that justifies the above stated observation is that 'X' is aqueous calcium hydroxide and
The option that justifies the above stated observation is that 'X' is aqueous calcium hydroxide andOfficial answer
From CBSE’s own marking scheme for this paper.
(B)
it turns milky due to formation of calcium carbonate and on passing excess of carbon dioxide it becomes colourless due to formation of calcium hydrogen carbonate which is soluble in water.
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CBSE Class 10 Science past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.