Chemistry

One of the products of the thermal decomposition of sodium trioxonitrate (V) is?

A. sodium B. nitrogen C. sodium dioxonitrate (III) D. sodium oxide Correct Answer: Option C - sodium dioxonitrate (III)

5 years ago

In the electrolytic extraction of aluminum; the function of the molten cryolite is to?

A. precipitate aluminium hydroxide B. lower the melting point of aluminium oxide C. act as raw materials D. act as…

5 years ago

The type of iron that is best suited for welding; making nails; chains and iron rods is?

A. pig iron B. wrought iron C. cast iron D. iron pyrites Correct Answer: Option B - wrought iron

5 years ago

Copper metal dissolves in concentrated trioxonitrate (V) acid with the resultant evolution of?

A. CO2 B. SO2 C. NO2 D. CO Correct Answer: Option C = NO2

5 years ago

Which of the following metals will show the highest metallic character?

A. Zinc B. Copper C. Barium D. Calcium Correct Answer: Option D - Calcium

5 years ago

Which of the following allotrope of carbon is a constituent of a lead pencil?

A. Graphite B. Diamond C. Lampblack D. Soot Correct Answer: Option A - Graphite

5 years ago

The gas that is most useful in protecting humans against solar radiation is?

A. chlorine B. ozone C. carbon (IV) oxide D. hydrogen sulphide Correct Answer: Option B - ozone

5 years ago

The gasification of coke is used for the manufacturing of?

A. producer gas B. natural gas C. synthetic gas D. industrial gas Correct Answer: Option C - synthetic gas

5 years ago

Hydrogen sulphide gas can act as?

A. an oxidizing agent B. a dehydrating agent C. a bleaching agent D. a precipitating agent Correct Answer: Option D…

5 years ago

The oxidation of ammonia in excess air produces?

A. NO B. N2O C. NO2 D. N2O4 Correct Answer: Option A - NO

5 years ago