Chemistry

Which of the following ions has the electron configuration 2,8,8?

A. Na+ B. Mg2+ C. F- D. CI- Correct Answer: Option D B. Mg2+

6 years ago

Which of the following substances is mainly responsible for the depletion of the ozone layer?

A. Oxygen B. Chlorofluorocarbon C. Carbon (ll) oxide D. Nitrogen (ll) oxide Correct Answer: Option B B. Chlorofluorocarbon

6 years ago

Brass is a mixture of?

A. Cu and Sn B. Cu and Zn C. Cu and Mg D. Cu and Pb Correct Answer: Option B…

6 years ago

A metal that is widely used in the manufacture of paints and overhead electric cables is?

A. aluminium B. copper C. iron D. lead Correct Answer: Option A A. aluminium

6 years ago

Which of the following pollutants is not usually recycled?

A. Aluminium cans B. Glass bottles C. Nuclear wastes D. Paper wastes Correct Answer: Option C C. Nuclear wastes

6 years ago

Which of the following industrial processes depends on the action of enzymes?

A. Liquefaction of air B. Manufacture of soap C. Brewing of beer D. Catalytic cracking Correct Answer: Option C C.…

6 years ago

An alkanol can be prepared by the reaction of an alkene with?

A. concentrated tetraoxosulphate (VI) acid B. bromine tetrachloroethane C. agueous potassium tetraoxomanganate (VII) D. sodium hydroxide solution Correct Answer: Option…

6 years ago

Which of the following substances would not produce ethanol when fermented?

A. Cane sugar B. Glucose C. Starch D. Vinegar Correct Answer: Option D D. Vinegar

6 years ago

Consider the following reaction equation: C16H34 → C5H12 + C11H22. The process represented by the equation is?

A. cracking B. fermentation C. polymerization D. reforming Correct Answer: Option A A. cracking

6 years ago

Which of the following devices function on redox reaction?

l. Dry cell ll. Car battery III. Electric generator A. l and lll only B. ll and lll only C.…

6 years ago
Show more Posts
Show previous Posts