Chemistry

Polystyrene is widely used as packaging materials for fragile objects during transportation because of its?

A. lightness B. low density C. high density D. high compressibility Correct Answer: Option D = high compressibility Explanation EPS…

5 years ago

A hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula. [C = 12, H = 1]

A. C2H6 B. C3H8 C. C3H4 D. C6H6 Correct Answer: Option D = C6H6 Explanation molecular mass = 2 x…

5 years ago

The purpose of H+ in the reaction below is to?

CH3COOC2H5 (l) + H2O (l) ⇌ CH3COOH(aq) + C2H5OH(aq) A. increase the yield of products B. maintain the solution at…

5 years ago

The polymer used in making car rear lights is?

A. perspex B. bakelite C. polystyrene D. polyacrylonitrile Correct Answer: Option A = perspex

5 years ago

The process of converting starch to ethanol is?

A. cracking B. distillation C. fermentation D. oxidation Correct Answer: Option C - fermentation

5 years ago

Due to the unstable nature of ethyne, it is stored by dissolving in?

A. ethane-1,2-diol B. propanol C. ethanoic acid D. propanone Correct Answer: Option D - propanone

5 years ago

Ethyne is passed through a hot tube containing organo-nickel catalyst to produce?

A. isoprene B. polythene C. ethanol D. benzene Correct Answer: Option D - benzene

5 years ago

The alkanol obtained from the production of soap is?

A. propanol B. ethanol C. glycerol D. methanol Correct Answer: Option C - glycerol Glycerol is the common name of…

5 years ago

The general formula of haloalkanes where X represents the halide is?

A. CnH2n-1X. B. CnH2nX. C. CnH2n+2 X D. CnH2n+1X Correct Answer: Option D - CnH2n+2 X

5 years ago

A few drops of NaOH solution was added to an unknown salt forming a white precipitate which is insoluble in excess solution. The cation likely present is?

A. Zn²+ B. Pb²+ C. Ca²+ D. Al³+ Correct Answer: Option C - Ca²+

5 years ago
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