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A sample of polystyrene is warmed under reflux in concentrated nitric acid and the clear mixture is poured in water to yield a X coloured precipitate. This precipitate is then extracted with ether and then with NaOH solution followed by washing with water in each extraction. The nitro compounds from the combined final aqueous extract and alkaline extract using concentrated HCl and zinc. The final solution after being diazotized and then cooled is poured into excess of alkaline naphthol to give Y coloured solution. What are the colours X and Y?
Which of the following solutions is alkaline?
Soaps are prepared by chemical treating of _________ by strong alkaline solutions.
Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.
The solutions of a trigonometric equation for which ___________ are called principal solutions.
Two solutions have milk & water in the ratio 7:5 and 6:11. Find the proportion in which these two solutions should Be mixed so that the resulting solution has 1 part milk and 2 parts water ?
Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in
Solutions having the same osmotic pressure are called __________ solutions.
আবেদ ও তার ৮ জন বন্ধু একটি কোম্পানি গঠনের উদ্দেশ্যে Finest Solutions এর শরণাপন্ন হয়। উক্ত প্রতিষ্ঠানটি নির্দিষ্ট ফি-এর বিনিময়ে কোম্পানি গঠনের যাবতীয় আনুষ্ঠানিকতা পালনে চুক্তিবদ্ধ হয়। Finest Solutions এখানে কার ভূমিকা পালন করবে?