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Sec 4 Express Science Chem TYS MCQ 2023 Set B
Quiz by HAO YI
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A titration is carried out to measure the volume of hydrochloric acid needed to neutralise aqueous sodium hydroxide.
Exactly 25 cm3 of aqueous sodium hydroxide is measured out into a conical flask and the hydrochloric acid is added.
Which apparatus is used during this experiment?
A
B
C
D
Four bottles containing colourless solutions have no labels.
A series of individual tests are carried out on each of the solutions.
Which bottle contains ammonium chloride solution?
A
B
C
D
A titration is carried out to measure the volume of hydrochloric acid needed to neutralise aqueous sodium hydroxide.
Exactly 25 cm3 of aqueous sodium hydroxide is measured out into a conical flask and the hydrochloric acid is added.
Which apparatus is used during this experiment?
Four bottles containing colourless solutions have no labels.
A series of individual tests are carried out on each of the solutions.
Which bottle contains ammonium chloride solution?
The temperature of a sample of a gas is increased.
Which row describes the changes in both the rate of collision of the gas particles and the average speed of the gas particles?
The atomic structures of four different particles are shown below.
What are the values for W, X, Y and Z?
Gallium combines with sulfur to make an ionic compound gallium sulfide.
The formula of gallium sulfide is Ga2S3.
Which row describes the melting point of gallium sulfide and the formulae of the ions in the compound?
What is the relative molecular mass, Mr, of (NH4)2CO3?
When sulfuric acid dissolves in water, there is an increase in temperature.
When ammonium nitrate dissolves in water, there is a decrease in temperature.
Which statement is correct?
Two test-tubes are set up, as shown.
The complete reaction in test-tube P takes 100 seconds and the complete reaction in test-tube Q takes 40 seconds.
Which statement explains the observation in test-tube Q?
Which statement about oxides are correct?
1 An aqueous solution of sulfur dioxide has a pH less than 7.
2 An aqueous solution of potassium oxide turns blue litmus paper red.
3 Carbon dioxide reacts with sulfuric acid to make a salt.
4 Potassium oxide reacts with hydrochloric acid to make a salt.
Element R has 12 protons. Elements Q has 8 more protons than R.
Which statement is correct?
Which statement about bromine and iodine is correct?
W, X, Y and Z are four different metals.
W does not react with acids.
X reacts with steam and acids but not with cold water.
Y reacts with cold water.
Z reacts slowly with acids but not with steam.
Which row shows the ease with which the metals can be extracted from their ores?
Some metals can be extracted from their ores by carbon.
Iron and metals less reactive than iron can be extracted from their ores by hydrogen.
Which row is correct?
Which row identifies the use for the named petroleum fraction?
Which statements about alkanes are correct?
1 The viscosity decreases as the number of carbon atoms increases.
2 They are unsaturated hydrocarbons.
3 Their general formula is CnH2n+2.
4 The flammability decreases as the number of carbon atoms increases.
Which statement about an alcohol is correct?
What is the most abundant noble gas in clean air?
