Chemistry

What are the two gases associated with the formation of acid rain?

A. CO2 and HCI B. CO2 and N2 C. CO2 and NO2 D. HCI and SO2 Correct Answer: Option C…

6 years ago

When a sample of water was boiled, it lathered more readily with soap. it can be concluded that the sample most likely contained?

A. magnesium tetraoxosulphate (VI) B. suspended solids C. Organic impurities D. calcium hydrogentrioxocarbonate (IV) Correct Answer: Option D D. calcium…

6 years ago

What is the main impurity in haematite?

A. CaSiO3 B. CaCO3 C. SiO3 D. Fe2O3 Correct Answer: Option C C. SiO3

6 years ago

Which of the following compound is used for removing impurities from bauxite?

A. NaOH B. CaCO3 C. Na3AIF6 D. H2SO4 Correct Answer: Option A A. NaOH

6 years ago

What volume of 0.20 mol dm‾³ NaOH solution would yield 5.0g of NaOH on evaporation to dryness? [NaOH = 40g mol‾¹]

A. 400 cm³ B. 625 cm³ C. 1000 cm³ D. 1600 cm³ Correct Answer: Option B B. 625 cm³ Explanation…

6 years ago

When excess ethene is shaken with acidified KMnO4 solution, the product obtained is?

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

6 years ago

What process does the following equation represent? (C6H10O5) + nH2O → nC6H12O6

A. Polymerization of glucose B. Hydrolysis of starch C. Fermentation of sugar D. Dehydration of carbohydrates Correct Answer: Option B…

6 years ago

The reaction of vegetable oil with a solution of wood ash is?

A. saponification B. neutralization C. hydrogenation D. esterification Correct Answer: Option A A. saponification

6 years ago

What is the organic product of the reaction of C2H5OH with excess acidified K2Cr2O7(aq)?

A. CH3COOH B. C2H5OC2H5 C. HCOOCH3 D. C2H5CHO Correct Answer: Option A A. CH3COOH

6 years ago

Which of the following substances could be responsible for the banana taste of a food flavour?

A. Methylbenzene B. Butanol C. Ethanol D. Pentylethanoate Correct Answer: Option D D. Pentylethanoate

6 years ago
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