Classify the following as amorphous and ...

Classify the following as amorphous and crystalline solids , polyurethane, naphthalene, benzoic acid, teflon, potassiumm nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

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Crystalline solids Benzoic acid, potassium nitrate, copper Amorphous solids. Polurethane, Teflon, cellophane, polyvinyl chloride, fibreglass.

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Classify the following as amorphous or crystalline solids: polyurethane, naphtalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

Classify the following solids into amorphous or crystalline solids. Bakelite, Platinum , Camphor , Oxalic acid , Melamine formaldehyde, Alum , Neoprene, Sugar , Solid CO_2 , Polythene.

Which of the following is an amorphous solid? (1) Teflon (2) Cellophane (3) Poly vinyl chloride (4) Fibre glass (5) All of these

Write a balanced chemical equation for each of the following reactions and also classify them. (a) Lead acetate solution is treated with dilute hydrochloric acid to form lead chloride and acetic acid solution. (b) A piece of sodium metal is added to absolute ethanol to form sodim ethoxide and hydrogen gas. (c) Iron (III) oxide on heating with carbon monoxide gas reacts to form solid iron and liberates carbon dioxide gas. (d) Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.

The question refer to the following salt solutions listed A to F (A] Copper nitrate [B] Iron sulphate [C] Iron (III) chloride [D] Lead nitrate [E] Magnesium sulphate [F] Zinc chloride Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution ?

The question refer to the following salt solutions listed A to F (A] Copper nitrate [B] Iron sulphate [C] Iron (III) chloride [D] Lead nitrate [E] Magnesium sulphate [F] Zinc chloride Which two solutions will give a white precipitate when acidified dilute hydrochloric acid followed by barium chloride solution ?

The question refer to the following salt solutions listed A to F (A] Copper nitrate [B] Iron sulphate [C] Iron (III) chloride [D] Lead nitrate [E] Magnesium sulphate [F] Zinc chloride Which solutions will give a white precipitate when dilute sulphuric acid is added it ?

The following materials are provided - solutions of cobalt chloride, ammonia, potassium permanganate, lime water, starch-iodide, sodium hydroxide, lead acetate, potassium iodide. Also provided are litmus and filter papers, glowing splinters and glass rods. Using the above how would you distinguish between: a] a neutral, acidic and a basic gas b] oxygen and hydrogen gas. c] carbon dioxide and sulphur dioxide gas d] chlorine and hydrogen chloride gas e) hydrogen sulphide and nitrogen dioxide gas f] ammonia and carbon dioxide gas g] zinc carbonate and potassium nitrate h] hydrated copper sulphate and anhydrous copper sulphate i] ammonium sulphate and sodium sulphate.

The questions below refer to the following salt solutions listed A to F:- A: Copper nitrate B: Iron [II] sulphate C: Iron [III] chloride D: Lead nitrate E: Magnesium sulphate F: Zinc chloride. i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution. [i.e. white ppt. insoluble in dil. HCI] ii) Which two solutions will give a white ppt. when treated with dil. HNO_3 & AgNO_3 soln. iii) Which soln. will give a white ppt. when either dil. HCl or dil. H_2SO_4 , is added to it. iv) Which soln. becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it. v) Which solution gives a white precipitate with excess ammonium hydroxide solution.

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