Sec 4 Express Science Chem TYS MCQ 2019 Set B
Quiz by HAO YI
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- Q1
Student carried out an experiment to study the rate of reaction when a piece of magnesium was added to some dilute hydrochloric acid.
Which piece of apparatus is not required for this experiment?
Bunsen Burner
stop-watch
gas syringe
conical flask
60s - Q2
Solid X is dissolved in water in a test-tube.
Aqueous sodium hydroxide is added to the test-tube and a white precipitate forms.
The white precipitate dissolves in excess aqueous sodium hydroxide.
Powdered aluminium is now added to the test-tube and the mixture is carefully heated.
A gas is evolved which turns damp red litmus paper blue.
What is X?
aluminium nitrate
ammonium sulfate
iron(II) nitrate
zinc sulfate
60s - Q360s
- Q4
Sodium chloride, NaCl, is an ionic compound.
Which statement about sodium chloride is not correct?
It contains positive and negative ions.
It dissolves in water.
It has a low melting point.
The ions are arranged in a giant crystal lattice.
60s - Q5
Two elements, A and B, forma a compound of formula AB3. A 'dot and cross' diagram of a molecule AB3 is shown. Only the outer shell electrons are shown.
Which statement is not correct?
The molecule contains a total of eight electrons.
A and B are both non-metals
B is hydrogen.
A is in Group 15 of the Periodic Table.
60s - Q6
Which ions are present in solid chromium sulfate, Cr2(SO4)3?
and
and
and
and
60s - Q7120s
- Q8
Solutions of two chemicals are mixed in a beaker.
A reaction occurs and a decrease in temperature is observed.
Which statement is correct?
An endothermic reaction occurs and the reacting chemicals lose energy.
An exothermic reaction occurs and the reacting chemicals gain energy.
An endothermic reaction occurs and the reacting chemicals gain energy.
An exothermic reaction occurs and the reacting chemicals lose energy.
60s - Q9
Copper(II) oxide reacts with sulfuric acid.
Which change increases the rate of reaction by increasing the movement of the particles?
increase in temperature of sulfuric acid
increase in temperature of sulfuric acid
using a catalyst
increase in concentration of sulfuric acid
60s - Q1060s
- Q11
The volume of gas produced in a reaction is measured against time.
Which results show the slowest average rate of reaction?
A
B
C
D
120s - Q1260s
- Q13
Some information about Group 1 elements is shown.
Which statement about the trends shown by the elements in Group 1 of the Periodic Table is not correct?
As the atomic number increases the melting point decreases.
As the number of protons increases the atomic radius increases.
As the number of electrons increases the elements are more reactive with water.
As the number of electron shells increases an electron is less easily lost.
60s - Q14
Astatine is at the bottom of Group 17 in the Periodic Table.
Which row describes the properties of astatine?
A
B
C
D
60s - Q15
The reactions of four metals are shown.
What is the order of reactivity of the metals?
A
B
C
D
120s
