Chemistry

Which of the following compounds will burn with a brick-red colour in a non-luminous Bunsen flame?

A. LiCI B. NaCl C. CaClN2 D. MgClN2 Correct Answer: Option C - CaClN2

5 years ago

Mineral acids are usually added to commercial hydrogen peroxide to?

A. oxidize it B. decompose it C. minimize its decomposition D. reduce it to water and oxygen Correct Answer: Option…

5 years ago

Commercial bleaching can be carried out using?

A. sulphur (IV) oxide and ammonia B. hydrogen sulphide and chlorine C. chlorine and sulphur (IV) oxide D. ammonia and…

5 years ago

A piece of filter paper moistened with lead (ll) ethanoate solution turns black when the paper is dropped into a gas likely to be?

A. sulphur (VI) oxide B. hydrogen chloride C. sulphur (VI) oxide D. hydrogen sulphide Correct Answer: Option D - hydrogen…

5 years ago

The highest rate of production of carbon(lV)oxide can be achieved using?

A. 0.05 mol-³ HCI and 5g powdered CaCO3 B. 0.05 mol-³ HCI and 5g lump CaCO3 C. 0.10 mol-³ HCI…

5 years ago

An increase in entropy can best be illustrated by?

A. mixing of gases B. freezing of water C. the condensation of vapour D. solidifying candle wax Correct Answer: Option…

5 years ago

A metal M displaces zinc from ZnCl solution. This shows that?

A. electrons flow from zinc to M B. M is more electropositive than zinc C. M is more electonegative than…

5 years ago

The oxidation number of boron in NaBH4 is?

A. -3 B. -1 C. +1 D. +3 Correct Answer: Option D = +3

5 years ago

During a titration experiment, 0.05 moles of carbon (lV) oxide is liberated. What is the volume of gas liberated?

A. 22.40 dm³ B. 11.20 dm³ C. 2.24 dm³ D. 1.12 dm³ Correct Answer: Option D - 1.12 dm³

5 years ago