1: Which of the following substances are used to produce nitric acid in industry?
(1) air (2) water
(3) nitrogen (4) ammonia
A. (1),(2)&(3)only B. (1),(2)&(4)only
C. (1),(3)&(4)only D. (2),(3)&(4)only
2: Which of the following statements concerning the reaction of aqueous ammonia with hydrochloric acid is correct?
A. The reaction is exothermic
B. A white precipitate is formed
C. Ammonium chloride and chlorine are produced
D. The product ammonium chloride is a covalent compound
3: Which of the following substances is/are the main products(s) when a mixture of ammonia and oxygen is passed over red-hot platinum?
(1) nitrogen
(2) nitrogen monoxide
(3) nitric acid
A. (1)only B. (2)only
C. (1)&(3)only D. (2)&(3)only
4: Which of the following experiments would produce sulphur dioxide?
(1) heating iron pyrites in air
(2) heating a mixture of iron and dilute sulphuric acid
(3) heating a mixture of copper and concentrated sulphuric acid
A. (1)&(2)only B. (1)&(3)only
C. (2)&(3)only D. (1),(2)&(3)
5: Which of the following statements concerning household bleach is correct?
A. the active ingredient of household bleach is sodium hydroxide
B. household bleach is produced by dissolving chlorine in water
C. household bleach can be used as a drain opener
D. the raw material for manufacturing household bleach is sodium chloride
6: Which of the following substances can react with magnesium to give a colourless gas which burns with a 'pop' sound?
(1) grape fruit juice
(2) citric acid crystals
(3) household bleach
A. (1)only B. (2)only
C. (1)&(3)only D. (2)&(3)only
俾埋解釋ㄚ ^^