Inorganic Chemistry - Group 2 and 7 Practice Questions
A-Levels · A-Level Chemistry · 145 free MCQs with instant results and detailed explanations.
145
Total
44
Easy
70
Medium
31
Hard
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Sample Questions from Inorganic Chemistry - Group 2 and 7
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following Group 2 elements has the highest melting point?
A.
Barium
B.
Calcium
C.
Strontium
D.
Magnesium
Show Answer & Explanation
Correct Answer: D
Magnesium has the highest melting point among the Group 2 elements due to its stronger metallic bonds compared to the others, which have larger atomic sizes and less effective nuclear charge.
Q2
Easy
What is the oxidation state of chlorine in potassium chloride (KCl)?
A.
+1
B.
0
C.
-1
D.
+7
Show Answer & Explanation
Correct Answer: C
In potassium chloride (KCl), potassium is in the +1 oxidation state, thus chlorine must be in the -1 oxidation state to balance the charge, making the compound neutral.
Q3
Easy
Which of the following statements about halogens is correct?
A.
Fluorine is the most reactive halogen.
B.
Bromine is a gas at room temperature.
C.
Iodine is more soluble in water than bromine.
D.
Chlorine is less reactive than iodine.
Show Answer & Explanation
Correct Answer: A
Fluorine is indeed the most reactive halogen due to its high electronegativity and small atomic size, which allows it to attract electrons more effectively compared to other halogens.
Q4
Medium
Which of the following group 2 elements has the highest melting point?
A.
Barium
B.
Strontium
C.
Calcium
D.
Magnesium
Show Answer & Explanation
Correct Answer: D
Magnesium has the highest melting point among the group 2 elements due to its smaller atomic size and stronger metallic bonds compared to the others.
Q5
Medium
What is the formula for the compound formed between magnesium and sulfur?
A.
MgS2
B.
Mg2S
C.
MgS
D.
MgS3
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Correct Answer: C
Magnesium and sulfur combine in a 1:1 ratio to form magnesium sulfide, represented by the formula MgS.
Q6
Medium
Which of the following compounds would you expect to be the least soluble in water?
A.
Calcium sulfate
B.
Barium sulfate
C.
Magnesium hydroxide
D.
Strontium hydroxide
Show Answer & Explanation
Correct Answer: B
Barium sulfate is known for its low solubility in water due to the larger barium ion, making it less soluble than the other compounds listed.
Q7
Medium
What is the oxidation state of chlorine in NaClO3?
A.
+1
B.
+3
C.
+5
D.
+7
Show Answer & Explanation
Correct Answer: C
In NaClO3, the oxidation state of chlorine is +5, calculated by using the known oxidation states of sodium (+1) and oxygen (-2).
Q8
Hard
Which of the following reactions correctly demonstrates the reducing properties of a Group 2 element?
A.
Mg + 2HCl → MgCl2 + H2
B.
Ba + O2 → BaO
C.
Ca + 2H2O → Ca(OH)2 + H2
D.
Sr + 2H2O → Sr(OH)2 + H2
Show Answer & Explanation
Correct Answer: C
Calcium reacts with water to produce calcium hydroxide and hydrogen gas, showcasing its reducing properties by donating electrons to form hydroxide ions.
Q9
Hard
What is the expected trend in electronegativity as you move down Group 7 of the periodic table?
A.
Electronegativity increases
B.
Electronegativity decreases
C.
Electronegativity remains constant
D.
Electronegativity fluctuates
Show Answer & Explanation
Correct Answer: B
As you move down Group 7, the electronegativity decreases due to the increasing atomic size and the shielding effect, which weakens the nucleus's pull on bonding electrons.
Q10
Hard
Which of the following Group 2 elements forms a compound that is highly soluble in water and has a characteristic blue color?
A.
Barium hydroxide
B.
Strontium sulfate
C.
Calcium nitrate
D.
Magnesium sulfate
Show Answer & Explanation
Correct Answer: C
Calcium nitrate, when dissolved in water, forms a clear solution that can appear blue due to the presence of certain impurities or ions; however, it is primarily noted for its high solubility. Other options either have limited solubility or do not form colored solutions.
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Inorganic Chemistry - Group 2 and 7 — A-Levels A-Level Chemistry Practice Questions Online
This page contains 145 practice MCQs for the chapter Inorganic Chemistry - Group 2 and 7 in A-Levels A-Level Chemistry. The questions are organized by difficulty — 44 easy, 70 medium, 31 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.