Chap 1
Quiz by Goh Ban Leng
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- Q 1/6Score 0
The diagram shows a set-up used to obtain carbon monoxide gas
What is the purpose of solution S?
29to prevent water from being drawn into the hot charcoal
to remove the presence of carbon dioxide gas
to remove the presence of water vapour
to remove the presence of hydrogen chloride gas
- Q1
The diagram shows a set-up used to obtain carbon monoxide gas
What is the purpose of solution S?
to prevent water from being drawn into the hot charcoal
to remove the presence of carbon dioxide gas
to remove the presence of water vapour
to remove the presence of hydrogen chloride gas
30s - Q2
A student follows the rate of the reaction when 0.2 g of magnesium, Mg reacts with excess sulfuric acid, H2SO4 at room temperature and pressure.
Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)
What is most suitable for measuring the volume of gas produced at different times during this experiment
a 50 cm3 gas syringe
place the apparatus on a balance and measure the loss in mass
an inverted 50 cm3 burette filled with water
an inverted 250 cm3 measuring cylinder filled with water
30s - Q3
A gas turns moist blue litmus paper red, is insoluble in water and less dense than air.
Which diagram shows the correct way of drying and collecting the gas?
30s - Q4
The diagram shows apparatus used to obtain carbon monoxide. Carbon dioxide produced reacts with charcoal according to the following equation.
CO2 + C → 2CO
What is the purpose of the aqueous sodium hydroxide?
to prevent water from being sucked back onto the hot carbon
to dry the gas
to remove hydrogen chloride from the gas
to remove carbon dioxide from the gas
30s - Q5
The apparatus set-up shown below shows the only method that can be used to collect a dry sample of gas X.
Which statements about gas X are true?
1 Gas X has a lower density than air.
2 Gas X is a basic oxide.
3 Gas X can be dried using concentrated sulfuric acid.
2 and 3 only
1 and 3 only
all of the above
1 and 2 only
30s - Q6
Sulfur dioxide gas can be produced and collected by reacting sodium sulfite with dilute hydrochloric acid poured into the round bottom flask using the funnel. The chemical equation is given below:
Na2SO3(s) + 2HCl(aq) → SO2(g) + 2NaCl(aq) + H2O(l)
What is the identity and purpose of solution Z?
water; to dissolve excess sodium sulfite
aqueous ammonia; to remove excess acid
concentrated sulfuric acid; to dry sulfur dioxide gas
calcium hydroxide solution; to neutralise sulfur dioxide gas
30s
