Principles Related To Practical Chemistry Questions

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[Medium]Elemental analysis of an organic compound gives carbon 40.0 percent, hydrogen 6.7 percent, and oxygen 53.3 percent by mass. What is the empirical form...
[Medium]Two liquids in a mixture have boiling points of 78 degrees and 110 degrees Celsius and are completely miscible with each other. Which purification tec...
[Medium]Steam distillation is chosen to purify aniline from a mixture containing non-volatile impurities. Which property of aniline makes this purification te...
[Medium]Mohr's salt, prepared in the laboratory from ferrous sulphate and ammonium sulphate, behaves differently from a coordination complex when dissolved in...
[Medium]A standard solution was prepared by dissolving 0.63 g of pure oxalic acid dihydrate in water and making up to 250 mL. What volume of 0.10 M sodium hyd...
[Easy]On a paper chromatogram, a coloured component travelled 2.7 cm from the baseline while the solvent front advanced 9.0 cm in the same run. Calculate th...
[Easy]A student boils the sodium fusion extract of an organic compound and adds sodium nitroprusside, obtaining a violet colouration. This observation confi...
[Medium]A salt solution gives a white precipitate with barium chloride that remains insoluble even after adding dilute hydrochloric acid. Which acid radical i...
[Medium]In the systematic analysis of basic radicals, hydrogen sulphide gas is passed through an acidified solution to precipitate Group II cations. Why is th...
[Easy]Which simple laboratory observation reliably distinguishes a carboxylic acid from a phenol when a small amount of solid sodium bicarbonate is added to...
[Medium]An aqueous solution of an unknown organic compound develops an intense violet colour when a few drops of neutral ferric chloride are added. The compou...
[Easy]Among the following organic liquids, which one will give a bright silver mirror with Tollens' reagent but no reaction with neutral ferric chloride sol...
[Medium]Heating 0.20 g of a chlorine-containing organic compound with fuming nitric acid and silver nitrate in a Carius tube yielded 0.287 g of silver chlorid...
[Medium]By Duma's method, 0.5 g of an organic compound on combustion produced 112 mL of nitrogen gas measured at standard temperature and pressure. Determine ...
[Medium]In Kjeldahl's estimation, 1.4 g of an organic compound liberated ammonia that was exactly neutralised by 20 mL of 1.0 N hydrochloric acid. Calculate t...
[Medium]The sodium fusion extract of an organic compound is acidified with dilute nitric acid and treated with silver nitrate, giving a pale yellow precipitat...
[Easy]During the qualitative detection of nitrogen by Lassaigne's test, the appearance of a Prussian blue colouration is due to the formation of which compo...
[Easy]Chromyl chloride test is used to detect:...
[Easy]EDTA is used in complexometric titration to determine:...
[Medium]Phenolphthalein is suitable indicator for titration of:...
[Easy]Primary standard for standardizing NaOH solution is:...
[Medium]In iodometric titration, potassium dichromate is used in:...
[Easy]Brown ring test is confirmatory for:...
[Medium]A buffer solution of pH 4.76 can be prepared by mixing:...
[Easy]Mohr's salt is:...
[Easy]Nessler's reagent is used to detect:...
[Easy]In gravimetric estimation of chloride, the precipitate formed is:...
[Easy]When ionic product exceeds solubility product:...
[Easy]Ammonium hydroxide is added group-wise in qualitative analysis to:...
[Easy]In redox titration of oxalic acid with KMnO₄, KMnO₄ acts as:...
[Easy]Brick-red flame is given by:...
[Easy]Borax bead test is used to detect:...