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Q 1/6
Score 0
The properties of three substances, A, B and C, are observed during an experiment.
I. Substances A, B and C are highly reactive towards water
II. Substances A, B and C are able to conduct electricity.
Which explanation best suits the relationship between substances A, B and C?
60
A, B and C are metal and non-metal elements
A, B and C are elements that belong in the same period in the Periodic Table
A, B and C are not all non-metal elements
A, B and C are elements that belong to the same group in the Periodic Table
Q 2/6
Score 0
Florence has an unknown solid that is either a pure element or a pure compound. Which is the most appropriate method to determine the chemical composition of the solid?
120
Crush and grind it
Pass electricity through it
Mix some acid with it
Dissolve it in water and filter
6 questions
Q.
The properties of three substances, A, B and C, are observed during an experiment.
I. Substances A, B and C are highly reactive towards water
II. Substances A, B and C are able to conduct electricity.
Which explanation best suits the relationship between substances A, B and C?
1
60 sec
Q.
Florence has an unknown solid that is either a pure element or a pure compound. Which is the most appropriate method to determine the chemical composition of the solid?
2
120 sec
Q.
If two different substances can react with one another, the resultant products must be a compound.
3
30 sec
Q.
If a substance can be dissolved in water, then this substance must be a compound.
4
30 sec
Q.
When sugar is heated, decomposition occurs and carbon and water vapour are formed. Which of the following statements about decomposition is true?
5
30 sec
Q.
Glucose is an example of a simple sugar. Carbon, hydrogen and oxygen can be found in the compound, glucose. Which of the following statements is true?
I. The ratio of carbon, hydrogen and oxygen in glucose is always fixed.
II. The ratio of carbon, hydrogen and oxygen in glucose depends on the size of the glucose compound.
III. Glucose cannot be broken down into simpler substances by chemical methods.
IV. Carbon, hydrogen and oxygen in glucose are elements.
