Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Gases in the Atmosphere
86 practice questions
Topics covered
Practice questions
41–50 of 86
Question 41
3 marks · Easy
Answer and see the solution →The table shows solutions formed by dissolving some oxides in water:
Solutions of different oxides Oxide Solution pH Aluminium oxide 7 Sulfur dioxide 3 Potassium oxide 13 (a)[1 mark]Which oxide forms a neutral solution? Give its pH.
(b)[1 mark]State whether sulfur dioxide is a metal oxide or a non-metal oxide.
(c)[1 mark]Explain why potassium oxide gives a pH of 13.
Question 42
1 mark · Easy
Answer and see the solution →Give an example of an acidic oxide.
Question 43
3 marks · Easy
Answer and see the solution →This question is about oxides and their properties.
(a)[1 mark]State whether iron(III) oxide is likely to be acidic, basic or neutral.
(b)[1 mark]Give the type of element which forms carbon monoxide.
(c)[1 mark]State a general property of metal oxides.
Question 44
2 marks · Easy
Answer and see the solution →A student burns 2.0 g of sodium in oxygen to form sodium oxide ( ). Sodium oxide is then added to water, and a solution forms that turns universal indicator blue.
Calculate the mass of sodium oxide formed (using Ar: Na = 23, O = 16), and state whether sodium oxide is an acidic or basic oxide.
Question 45
2 marks · Easy
Answer and see the solution →When 1.6 g of phosphorus is burned in excess oxygen, phosphorus(V) oxide ( ) is formed as a white solid.
Calculate the mass of oxygen that reacts (Ar: P = 31, O = 16), and state whether phosphorus(V) oxide is acidic or basic.
Question 46
2 marks · Normal
Answer and see the solution →State whether the following oxides are acidic or basic:
(a)[1 mark]Sodium oxide (Na2O)
(b)[1 mark]Carbon dioxide (CO2)
Question 47
4 marks · Normal
Answer and see the solution →The table below shows some oxides and whether they are formed from metals or non-metals.
(a)[0 marks]Some examples of oxides Oxide Element type Calcium oxide Metal Sulfur dioxide Non-metal Magnesium oxide Metal Carbon dioxide Non-metal (b)[2 marks]Complete the table by writing whether each oxide is acidic or basic.
(c)[2 marks]Explain why magnesium oxide and sulfur dioxide have different acid-base properties.
Question 48
3 marks · Normal
Answer and see the solution →Copper(II) oxide is formed by heating copper in oxygen.
Copper(II) oxide reacts with hydrochloric acid to form copper(II) chloride and water.
Explain, with reasons, why copper(II) oxide is classified as a basic oxide. Include in your answer what type of element forms this oxide, and what is observed when it is added to hydrochloric acid.
Question 49
4 marks · Normal
Answer and see the solution →Below is a table of some oxides and whether each produces an acidic, basic, or neutral solution when dissolved in water. Complete the table.
(a)[4 marks]Properties of some oxides in water Oxide Solution formed in water (acidic, basic or neutral) Iron(III) oxide Silicon dioxide Sodium oxide Nitrogen monoxide Question 50
1 mark · Normal
Answer and check →Which statement about metal oxides is correct?
- A.They are always acidic.
- B.They are usually basic.
- C.They are usually neutral.
- D.They react with water to form acidic solutions.