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Physical Properties of Sulphuric Acid

Which of the ...

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Which of the following is responsible for turning moist starch iodide paper blue when it is brought in contact with ozone 1. Liberatio of iodine 2 .liberatuon of oxygen 3 formation of alkali 4. All of these

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Q. Assertion :When moist starch iodide paper comes in contact with chlorine, it turns blue back. Reason: Free iodine is liberated from potassium iodide.

Q. Chlorine turns moist starch iodide paper blue black. Why?

A substance X when heated with conc. H₂SO₄, liberates a gas which turns moist starch paper blue. The substance X is:

Q. Which of the following gases turns starch iodide paper blue?

Q. When moist starch iodide paper is introduced near ______ gas, its colour changes to blue-black.

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