Sec 4 Normal Science Chem TYS MCQ 2020 Set B

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Q 1/18
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A bottle of purple ink contains a mixture of a red dye and a blue dye.
Which method is used to separate the red and blue dyes?
29
filtration
evaporation
boiling
paper chromatography

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18 questions

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Q1
A bottle of purple ink contains a mixture of a red dye and a blue dye.
Which method is used to separate the red and blue dyes?
filtration
evaporation
boiling
paper chromatography
60s
Q2
60s
Q3
Which statement describes what happens to the particles when a solid is heated?
They gain energy and move further apart.
They gain energy and move closer together.
They lose energy and move further apart.
They lose energy and move closer together.
60s
Q4
Compounds contain two or more atoms of different elements chemically combined.
Which list contains only compounds?
CH₄ Cl₂ NaCl
Cl₂ CO H₂O
HCl H₂O H₂SO₄
CH₄ H₂ H₂SO₄
60s
Q5
Which row describes the properties of a simple covalent substance?
A
B
C
D
60s
Q6
Copper(II) oxide is a black powder which is insoluble in water.
Copper(II) oxide reacts with sulfuric acid to form copper(II) sulfate.
Copper(II) sulfate is soluble in water.
Which method describes how pure copper(II) sulfate crystals are made?
Add copper(II) oxide to warm sulfuric acid. Filter off the precipitate and dry it between filter papers.
Add indicator to sulfuric acid and add copper(II) oxide until the solution goes neutral. Evaporate some of the water from the filtrate and leave to cool.
Add excess sulfuric acid to copper(II) oxide until it stops fizzing then filter. Evaporate off the water.
Add excess copper(II) oxide to warm sulfuric acid then filter. Evaporate some of the water from the filtrate and leave to cool.
60s
Q7
Sodium carbonate reacts with dilute hydrochloric acid at room temperature.
The reactants are Na₂CO₃(s) and HCl(aq).
What are the products formed and their state symbols?
Na(s) + H₂O(g) + Cl₂(g) + CO₂(g)
NaCl(aq) + H₂(g) + HCO₃(g)
NaCl(aq) + HCO₃(aq)
NaCl(aq) + H₂O(l) + CO₂(g)
60s
Q8
Sodium, aluminium and sulfur are in the same period of the Periodic Table.
Which trend in types of oxides occurs across this period?
A
B
C
D
60s
Q9
Calcium hydroxide is added slowly to acidic soil to reduce acidity.
The pH samples of the soil are measured using Universal Indicator.
Which graph shows the change in pH as calcium hydroxide is added to the soil?
60s
Q10
Part of the Periodic Table is shown.
Which statement about atoms of L and M is correct?
Atoms of L have a larger relative atomic mass than atoms of M.
Atoms of L have smaller proton (atomic) number than atoms of M.
Atoms of L have more metallic character than atoms of M.
Atoms of L have fewer valency electrons than atoms of M.
60s
Q11
Which row about bromine is correct?
A
B
C
D
60s
Q12
A shiny grey solid X, reacts vigorously with cold water to form a solution which turns red litmus blue.
What is X?
magnesium
potassium
lead
zinc
60s
Q13
In which test-tube will the iron nails rust the most after a few days?
60s
Q14
Which row shows the approximate volume composition of dry air?
A
B
C
D
60s
Q15
Sulfur dioxide is a common atmospheric pollutant.
Which process produces sulfur dioxide?
the combustion of fossil fuels
a reaction in air when lightning strikes
the incomplete combustion of propane
the reaction of limestone building with acid rain
60s