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Effect on Indicators by Acids and Bases

State the inf...

Question

State the inference drawn from the following observations:
A gas $Q$ turns moist lead acetate paper silvery black. Identify the gas $Q$ .

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Solution

When salt reacts with dil. sulphuric acid $H_{2}$ gas is evolved. $H_{2}$ gas turns the lead acetate paper silvery black.

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Q. Gas (A) and Gas (B) both turns

K_{2} C r_{2} O_{2} / H^{+}

green. Gas (A) also turns lead acetate paper black. When gas (A) is passed into gas (B) in aqueous solution, yellowish white turbidity appears.

H_{2} S

enter 1, else enter 0.

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Effect on Indicators by Acids and Bases

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