This question is about metals - AQA - GCSE Chemistry - Question 6 - 2021 - Paper 1
Question 6
This question is about metals.
Table 3 shows information about four substances.
Table 3
Substance | Melting point in °C | Boiling point in °C | Does it... show full transcript
Worked Solution & Example Answer:This question is about metals - AQA - GCSE Chemistry - Question 6 - 2021 - Paper 1
Step 1
Which substance could be a metal?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Substance C could be a metal as it has a high melting point and does not conduct electricity in the liquid state, which is characteristic of metals.
Step 2
Explain why alloys are harder than pure metals.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
In an alloy, the atoms are of different sizes. This distortion in the layers of atoms makes it harder for the layers to slide over each other compared to a pure metal, where the layers are uniform.
Step 3
Describe a method the student could use to compare the reactivity of metal Q with that of zinc.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To compare the reactivity of metal Q with zinc, measure the temperature change when each metal is added to silver nitrate solution. Ensure that both metals are added to the same concentration and volume of the solution. Measure and record the initial temperature of the solution before adding the metals. The greater the temperature change observed after the reaction, the more reactive the metal.
