
Chemistry Concepts for Year 12

Quiz
•
Chemistry
•
12th Grade
•
Hard
Favour Idogun
Used 1+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mole ratio in the reaction 2H2 + O2 -> 2H2O?
2:2:1
1:2:2
1:1:1
2:1:2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define stoichiometry and its importance in chemical reactions.
Stoichiometry deals exclusively with the physical properties of substances.
Stoichiometry is a method for measuring temperature changes in reactions.
Stoichiometry is only relevant in biological processes.
Stoichiometry is essential for quantifying relationships in chemical reactions, ensuring accurate measurements and predictions of reactants and products.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the mass of NaCl produced from 0.5 moles of Na and excess Cl2.
22.99 g
29.22 g
58.44 g
35.45 g
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the physical properties of metals?
The physical properties of metals include conductivity, malleability, ductility, luster, high density, and high melting and boiling points.
Absence of luster and low melting points
Poor conductivity and high reactivity
Brittleness and low density
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the term 'ductility' in relation to metals.
Ductility describes the hardness of a metal when subjected to heat.
Ductility is the ability of a metal to be stretched into a wire or deformed without breaking.
Ductility is the ability of a metal to conduct electricity efficiently.
Ductility refers to a metal's resistance to corrosion.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the electron configuration of a typical metal?
[noble gas] ns^2 (for alkaline earth metals) or [noble gas] ns^2 nd^1-10 (for transition metals)
[noble gas] ns^2 np^1
[noble gas] ns^2 nd^11
[noble gas] ns^1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the structure of alkanes and provide an example.
An example of an alkane is ethylene (C2H4).
An example of an alkane is butane (C4H10).
Alkanes are characterized by double bonds between carbon atoms.
An example of an alkane is propane (C3H8).
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