IGCSE Chemistry multiple choice
Authored by Pearly Wong
Chemistry
10th - 11th Grade
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement explains why ammonia gas, NH3, diffuses at a faster rate than
hydrogen chloride gas, HCl ?
Ammonia expands to occupy all of the space available.
Ammonia has a smaller relative molecular mass than hydrogen chloride.
Ammonia is an alkali and hydrogen chloride is an acid.
Ammonia molecules diffuse in all directions at the same time.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2.00 g of powdered calcium carbonate is added to 50.0 cm3 of hydrochloric acid.
Which apparatus is used to measure the calcium carbonate and the hydrochloric acid?
calcium carbonate- balance; hydrochloric acid-burette
calcium carbonate-balance; hydrochloric acid-thermometer
calcium carbonate-pipette; hydrochloric acid-burette
calcium carbonate-pipette; hydrochloric acid-thermometer
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The measurements from a chromatography experiment using substance F are shown. The diagram is not drawn to scale.
What is the Rf value of F?
0.55
0.61
0.90
1.64
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement describes the structure of an ionic compound?
It is a giant lattice of oppositely charged ions.
It is a giant lattice of positive ions in a ‘sea’ of electrons.
It is a giant molecule of oppositely charged ions.
It is a simple molecule of oppositely charged ions.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Propane burns in oxygen.
C3H8 + xO2 → 3CO2 + yH2O
Which values of x and y balance the equation?
x:5, y:4
x:7, y:4
x:10, y:8
x:13, y:8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Magnesium reacts with sulfuric acid.
What are the formulae of the products formed in this reaction?
MgSO4 and H2
MgSO4 and H2O
Mg(SO4)2 and H2
Mg(SO4)2 and H2O
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement explains why graphite is used as a lubricant?
All bonds between the atoms are weak.
It conducts electricity.
It has a low melting point.
Layers in the structure can slide over each other.
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