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Types of Redox Reactions

The compound ...

Question

The compound which is responsible for the brown ring in the brown ring test for identifying the nitrate ion :

A

Iron [III] chioride

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B

Chromium sulphate

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C

Nitrous Iron [II] sulphate

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D

Lead [II] chioride

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Solution

The correct option is B Nitrous Iron [II] sulphate
A Nitrus iron (II)sulphate.
Is the compound which is responsible for the brown ring in the brown ring test for identifying the nitrate ion.

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Q. Select from the list given (a to e) one substance in each case which matches the description given in parts (i) to (v). (Note: Each substance is used only one in the answer.)
(a) Nitroso Iron (II) sulphate
(b) Iron (III) chloride
(c) Chromium sulphate
(d) Lead (II) chloride
(e) Sodium chloride.
(i) A compound which is deliquescent.
(ii) A compound which is insoluble in cold water, but soluble in hot water.
(iii) The compound responsible for the brown ring during the brown ring test of nitrate ion.
(iv) A compound whose aqueous solution is neutral in nature.
(v) The compound which is responsible for the green colouration when sulphur dioxide is passed through acidified potassium dichromate solution.

Q. In brown ring test, which compound is responsible for ring formation?

(a) Explain with the help of a balanced equation, the brown ring test for nitric acid.

(b) Why is freshly pepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test ?

Q. Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?

Q. (a) Explain with the help of a balanced equation the brown ring test for nitric acid.
(b) Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test? [5 MARKS]

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