Chemistry

Which of the following methods is suitable for the preparation of an insoluble salt?

A. Action of an acid on a metal B. Double decomposition C. Neutralisation D. Action of an acid on a…

5 years ago

Which of the following is not a property of trioxonitrate (V) salts?

A. Positive reaction to the brown ring test B. Ability to dissolve in cold water C. Decomposition on being strongly…

5 years ago

The following oxides react with water except?

A. Na2O B. SO3 C. NO2 D. CO2 E. CuO Correct Answer: Option E - CuO

5 years ago

An aqueous solution is acidic if?

A. its pH value is high B. it s corrosive C. it changes the colour of litmus D. it has…

5 years ago

The greenhouse effect is a climatic condition associated with the presence of excess?

A. carbon (IV) oxide B. hydrogen sulphide C. nitrogen (ll) oxide D. ammonia gas Correct Answer: Option A - carbon…

5 years ago

Environmental pollution problems are generally more severe in countries which have?

A. dense population B. low birth rate C. great land mass D. limited industries Correct Answer: Option A - dense…

5 years ago

Which of the following is needed to produce slag during the extraction of iron in the blast furnace?

A. Cryolite B. Limestone C. Carbon D. Sulphur Correct Answer: Option B - Limestone

5 years ago

Geometric (cis-trans) isomerism is exhibited by?

A. C2H2CI2 B. CH2CI5 C. C4H10 D. C5H12 Correct Answer: Option A - C2H2CI2

5 years ago

Which of the following is a secondary alkanol?

A. OHCI2-CH2OH B. H2C=CH-CH2OH C. CH3-CH(OH)-CH3 D. CH3-(CH2)3-CH2OH Correct Answer: Option C - CH3-CH(OH)-CH3

5 years ago

Alkanoates are produced from alkanols by?

A. fermentation B. saponification C. oxidation D. esterification Correct Answer: Option D - esterification

5 years ago