16363913
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace más de 5 años
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Pregunta 1
Pregunta
Dry air is passed over hot copper until all the oxygen has reacted.
The volume of gas at the end of the reaction is 120 cm^3
What is the starting volume of dry air?
Image:
Q1 (binary/octet-stream)
Respuesta
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A 132 cm^3
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B 152 cm^3
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C 180 cm^3
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D 570 cm^3
Pregunta 2
Pregunta
A steel bicycle which had been left outdoors for several months was starting to rust.
What would not reduce the rate of corrosion?
Respuesta
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A Remove the rust and paint the bicycle.
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B Remove the rust and store the bicycle in a dry shed.
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C Remove the rust and wipe the bicycle with a clean, damp cloth.
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D Remove the rust and wipe the bicycle with an oily cloth.
Pregunta 3
Pregunta
Which statements about water are correct?
1 Household water contains dissolved salts.
2 Water for household use is filtered to remove soluble impurities.
3 Water is treated with chlorine to kill bacteria.
4 Water is used in industry for cooling.
Respuesta
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A 1, 2, 3 and 4
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B 1, 2 and 3 only
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C 1, 3 and 4 only
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D 2, 3 and 4 only
Pregunta 4
Pregunta
Farmers use fertilisers to replace minerals in the soil that have been removed by the crops they grow.
Which elements in the soil are replaced by adding fertilisers?
Respuesta
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A Ca, P, O
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B K, O, S
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C N, K, P
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D N, O, S
Pregunta 5
Pregunta
Which statement is correct?
Respuesta
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A Atmospheric carbon dioxide is not a cause of climate change.
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B Atmospheric methane is produced by respiration.
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C Burning natural gas decreases the level of carbon dioxide in the atmosphere.
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D Decomposition of vegetation causes an increase in atmospheric methane.
Pregunta 6
Pregunta
Which statement about sulfur and its compounds is not correct?
Respuesta
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A Sulfur dioxide is used as a food preservative.
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B Sulfur dioxide turns acidified aqueous potassium manganate(VII) from purple to colourless.
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C Sulfur forms a basic oxide.
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D Sulfur is used in the manufacture of sulfuric acid.
Pregunta 7
Pregunta
Ammonium nitrate is a common fertiliser used by farmers to increase the yield of their crops.
Which compound reacts with ammonium nitrate to form ammonia?
Respuesta
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A calcium hydroxide
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B potassium nitrate
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C sodium chloride
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D sodium phosphate
Pregunta 8
Pregunta
Which process does not release a greenhouse gas?
Respuesta
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A digestion of food in cows
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B reaction between zinc and hydrochloric acid
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C respiration by animals
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D thermal decomposition of calcium carbonate
Pregunta 9
Respuesta
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A
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B
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C
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D
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