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Sec 4 Normal Science Chem TYS MCQ 2020 Set B

Quiz by HAO YI

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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
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    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?

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    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?

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    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?

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    60s
  • Q10

    Part of the Periodic Table is shown.

    Which statement about atoms of L and M is correct?

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    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?

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    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?

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    60s
  • Q14

    Which row shows the approximate volume composition of dry air?

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    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

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