Salts Practice Questions
SPM (Malaysia) · SPM Chemistry · 150 free MCQs with instant results and detailed explanations.
150
Total
46
Easy
75
Medium
29
Hard
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Sample Questions from Salts
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What type of salt is formed when hydrochloric acid reacts with sodium hydroxide?
A.
Sodium chloride
B.
Sodium bicarbonate
C.
Sodium sulfate
D.
Sodium nitrate
Show Answer & Explanation
Correct Answer: A
The reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) produces sodium chloride (NaCl) and water (H2O). This is a classic example of a neutralization reaction, where an acid reacts with a base to form a salt and water.
Q2
Easy
Which of the following salts is commonly used in fertilizers?
A.
Calcium carbonate
B.
Ammonium sulfate
C.
Sodium chloride
D.
Potassium bromide
Show Answer & Explanation
Correct Answer: B
Ammonium sulfate (NH4)2SO4 is commonly used in fertilizers as it provides essential nitrogen and sulfur to plants, promoting healthy growth. It is a source of nutrients that are critical for plant development.
Q3
Easy
What is the pH level of a neutral salt solution?
A.
0
B.
7
C.
14
D.
4
Show Answer & Explanation
Correct Answer: B
A neutral salt solution has a pH level of 7. This is the point where the solution is neither acidic nor basic, indicating that the concentrations of hydrogen ions (H+) and hydroxide ions (OH-) are equal.
Q4
Medium
Which of the following salts is formed when hydrochloric acid reacts with sodium hydroxide?
A.
Potassium chloride
B.
Sodium chloride
C.
Calcium chloride
D.
Magnesium chloride
Show Answer & Explanation
Correct Answer: B
Sodium chloride is formed from the neutralization reaction of hydrochloric acid (HCl) and sodium hydroxide (NaOH), producing NaCl and water. This is a classic acid-base reaction.
Q5
Medium
What is the solubility product constant (Ksp) of a salt if 0.04 mol of the salt dissolves in one liter of water at a specific temperature?
A.
1.6 x 10^-3
B.
1.6 x 10^-4
C.
2.5 x 10^-4
D.
1.6 x 10^-5
Show Answer & Explanation
Correct Answer: A
The solubility product constant (Ksp) can be calculated from the concentration of dissolved ions. For a salt dissociating into two ions, Ksp = [A^+] * [B^-]. In this case, both ions are present at 0.04 mol/L, thus Ksp = 0.04 * 0.04 = 1.6 x 10^-3.
Q6
Medium
Which of the following salts is commonly used as a fertilizer due to its nitrogen content?
A.
Sodium sulfate
B.
Ammonium nitrate
C.
Potassium chloride
D.
Calcium carbonate
Show Answer & Explanation
Correct Answer: B
Ammonium nitrate is rich in nitrogen, making it an ideal fertilizer. It provides plants with essential nutrients, particularly nitrogen necessary for plant growth.
Q7
Medium
When a salt dissolves in water, what happens to its ions?
A.
They combine to form new compounds.
B.
They remain in the solid state.
C.
They dissociate and move freely in solution.
D.
They precipitate out of solution.
Show Answer & Explanation
Correct Answer: C
When a salt dissolves in water, its ions dissociate from the solid lattice and move freely in the solution, allowing them to conduct electricity and participate in reactions.
Q8
Hard
Which of the following salts is formed by the reaction of a strong acid with a weak base?
A.
Ammonium chloride (NH4Cl)
B.
Sodium sulfate (Na2SO4)
C.
Calcium carbonate (CaCO3)
D.
Potassium nitrate (KNO3)
Show Answer & Explanation
Correct Answer: A
Ammonium chloride (NH4Cl) is formed from hydrochloric acid (strong acid) and ammonia (weak base). Strong acids react with weak bases to produce acidic salts.
Q9
Hard
What is the primary reaction type occurring when sodium chloride is formed from sodium and chlorine gas?
A.
Synthesis Reaction
B.
Decomposition Reaction
C.
Single Replacement Reaction
D.
Double Replacement Reaction
Show Answer & Explanation
Correct Answer: A
The formation of sodium chloride from sodium and chlorine gas is a synthesis reaction because two reactants combine to form a single product.
Q10
Hard
If 0.5 moles of sodium sulfate (Na2SO4) is fully dissolved in water, how many moles of sodium ions (Na+) are produced?
A.
0.5 moles
B.
1.0 moles
C.
1.5 moles
D.
2.0 moles
Show Answer & Explanation
Correct Answer: D
Sodium sulfate dissociates into 2 sodium ions for each formula unit. Therefore, 0.5 moles of Na2SO4 produces 1.0 mole of Na2SO4 x 2 = 2.0 moles of Na+.
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Salts — SPM (Malaysia) SPM Chemistry Practice Questions Online
This page contains 150 practice MCQs for the chapter Salts in SPM (Malaysia) SPM Chemistry. The questions are organized by difficulty — 46 easy, 75 medium, 29 hard — so you can choose the right level for your preparation.
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