1.
Which of the following chemical equations is the correct representation of the preparation of carbon dioxide?
CaCO3 + 2HCl → CaO + Cl2 + H2 + CO2
CaCO3 + 2HCl → CaCl2 + H2CO3
CaCO3 + 2HCl → CaO + Cl2 + H2O + CO
CaCO3 + 2HCl → CaCl2 + H2 + CO2
CaCO3 + 2HCl → CaCl2 + H2O + CO2
2.
Which of the following substances reacts with ammonium chloride to produce ammonia gas?
Calcium hydroxide
Calcium chloride
Calcium carbonate
Calcium sulphate
Calcium nitrate
3.
When carbon dioxide is passed through lime water
the lime water becomes warm
the lime water turns milky
the lime water remains clear
lime is produced
the lime water decomposes
4.
The gas produced when dilute hydrochloric acid is added to calcium carbonate is
ammonia.
carbon dioxide.
chlorine.
hydrogen.
oxygen.
5.
The gas usually used in fire extinguishers is
carbon dioxide.
carbon monoxide.
hydrogen.
oxygen.
6.
The bad smell that comes out of a urinal is due to the presence of
ammonia.
hydrogen.
carbon dioxide.
nitrogen.
7.
The chemicals used in the preparation of ammonia in the laboratory are
ammonium chloride and calcium hydroxide.
ammonium nitrate and sodium chloride.
ammonium sulphate and calcium chloride.
ammonium sulphate and sodium chloride.
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