Q. In oxidation reactions, the oxidation number of an atom

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Q. The tube dipping in water in wash bottle has an angle of

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Q. The color of powdered manganese dioxide is

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Q. When a small amount of salt is added to water, the boiling point of water

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Q. The color of copper carbonate is

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Q. The test used for the confirmation of the nitrates is

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Q. Theendpointin KMnO₄ titration is always

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Q. K₂Cr₂O₇ is a crystalline solid which has color

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Q. In separating various ink by chromatography, the locating agent used is

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Q. When starch is added to iodine solution, the color becomes

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Q. The gas produced when conc. H₂SO₄ reacts with KCl is

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Q. Schiff's reagent is used to detect the presence of

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Q. Corrosion is a natural

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Q. Lake test is given by

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Q. The factors important for rusting of iron are

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Q. The sulphide which is orange in color, is

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Q. The color of ferrous sulphate is

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Q. The most commonly desiccating agent used in a desiccator is

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Q. Which one of the following does not belong to conc. H₂SO₄ group?

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Q. H₂S in acid medium is used as a group reagent for group

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