Paper 1 Chemistry - Chemical Changes
Questions with Answers 2024 Test
acid + base = .......... + ............. - Correct Answer acid + base → salt + water
Which of the following metals will react vigorously with oxygen at room temperature?
Gold
Copper
Calcium
Potassium - Correct Answer potassium
What is the balanced equation for the reaction of sodium with oxygen? - Correct
Answer 4Na + O₂ → 2Na₂O
What are the products of the reaction of calcium with water? - Correct Answer Calcium
hydroxide and hydrogen
What are the products of the reaction of zinc with sulfuric acid? - Correct Answer Zinc
sulfate and hydrogen
What would you expect to see when magnesium reacts with hydrochloric acid? -
Correct Answer Bubbles/fizzing
give 3 facts about the reactivity series - Correct Answer Metals in the middle of the
table react with oxygen and acids, but not with water
Metals at the top of the table react with oxygen, water and acids
metals at the top are the most reactive
What would you expect to see when zinc is added to copper sulfate solution? - Correct
Answer When zinc is added to copper sulfate solution it displaces copper to form zinc
, sulfate. The blue copper sulfate solution will become colorless as zinc sulfate is formed,
and copper will be produced as a brown solid.
What are the products of the reaction of silver oxide with hydrogen? - Correct Answer
Hydrogen is above silver in the reactivity series so will displace silver in this reaction to
form water plus silver.
what metal can be extracted from its native state from the earth ? - Correct Answer
Gold
Which of the following metals can be extracted from its ore by reduction with carbon?
Magnesium
Potassium
Copper
Aluminum - Correct Answer Copper
Which method could be used to extract calcium from the earth? - Correct Answer
electrolysis
Which substance is reduced in the reaction: Zinc oxide + carbon → zinc + carbon
dioxide? - Correct Answer Zinc oxide is reduced as it loses oxygen to form pure zinc.
what is oxidization and what is reduction ? - Correct Answer Oxidation is the gain of
oxygen
reduction is the loss of oxygen.
What are the products of the reaction of sodium and hydrochloric acid? - Correct
Answer Metals react with acids to form a salt plus hydrogen.
sodium reacts with hydrochloric acid to form sodium chloride and hydrogen: 2Na +2HCl
→ 2NaCl + H2.
what reaction will produce a salt + water + carbon dioxide? - Correct Answer Acid +
metal carbonate
what is a base ? - Correct Answer a substance that neutralizes an acid
Questions with Answers 2024 Test
acid + base = .......... + ............. - Correct Answer acid + base → salt + water
Which of the following metals will react vigorously with oxygen at room temperature?
Gold
Copper
Calcium
Potassium - Correct Answer potassium
What is the balanced equation for the reaction of sodium with oxygen? - Correct
Answer 4Na + O₂ → 2Na₂O
What are the products of the reaction of calcium with water? - Correct Answer Calcium
hydroxide and hydrogen
What are the products of the reaction of zinc with sulfuric acid? - Correct Answer Zinc
sulfate and hydrogen
What would you expect to see when magnesium reacts with hydrochloric acid? -
Correct Answer Bubbles/fizzing
give 3 facts about the reactivity series - Correct Answer Metals in the middle of the
table react with oxygen and acids, but not with water
Metals at the top of the table react with oxygen, water and acids
metals at the top are the most reactive
What would you expect to see when zinc is added to copper sulfate solution? - Correct
Answer When zinc is added to copper sulfate solution it displaces copper to form zinc
, sulfate. The blue copper sulfate solution will become colorless as zinc sulfate is formed,
and copper will be produced as a brown solid.
What are the products of the reaction of silver oxide with hydrogen? - Correct Answer
Hydrogen is above silver in the reactivity series so will displace silver in this reaction to
form water plus silver.
what metal can be extracted from its native state from the earth ? - Correct Answer
Gold
Which of the following metals can be extracted from its ore by reduction with carbon?
Magnesium
Potassium
Copper
Aluminum - Correct Answer Copper
Which method could be used to extract calcium from the earth? - Correct Answer
electrolysis
Which substance is reduced in the reaction: Zinc oxide + carbon → zinc + carbon
dioxide? - Correct Answer Zinc oxide is reduced as it loses oxygen to form pure zinc.
what is oxidization and what is reduction ? - Correct Answer Oxidation is the gain of
oxygen
reduction is the loss of oxygen.
What are the products of the reaction of sodium and hydrochloric acid? - Correct
Answer Metals react with acids to form a salt plus hydrogen.
sodium reacts with hydrochloric acid to form sodium chloride and hydrogen: 2Na +2HCl
→ 2NaCl + H2.
what reaction will produce a salt + water + carbon dioxide? - Correct Answer Acid +
metal carbonate
what is a base ? - Correct Answer a substance that neutralizes an acid
