Question detail

Chemical changes case 120 ph-precision. A student explains pH or neutralisation. Which option avoids vague wording? Focus on safety precautions when acids and heating solutions during in Soluble salts, not on a neighbouring Unit 4.4 reaction idea.

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Reactions of acids

Question

A. Chemical changes case 120 ph-precision: Links pH or neutralisation to hydrogen ions, hydroxide ions or water formation for safety precautions when acids and heating solutions during
B. Chemical changes case 120 ph-precision: Says strong acid means concentrated acid (Soluble salts)
C. Chemical changes case 120 ph-precision: Says neutralisation only means the mixture becomes harmless (safety precautions when acids and heating solutions during)
D. Chemical changes case 120 ph-precision: Uses pH numbers without linking them to acidity or alkalinity (Reactions of acids)

Answer

Explanation

The correct option is Chemical changes case 120 ph-precision: Links pH or neutralisation to hydrogen ions, hydroxide ions or water formation for safety precautions when acids and heating solutions during. It is correct because it directly supports the approved learning objective to describe safety precautions when using acids and heating solutions during salt preparation in Soluble salts. The other options are incorrect because they blur a Unit 4.4 concept boundary: acid versus alkali versus base, oxidation versus reduction, displacement versus reduction, electrolysis versus electroplating, anode versus cathode, positive versus negative ions, oxidation state versus ionic charge, or strong acid versus concentrated acid.

Common mistake

Ignoring Safety Equipment

Students often forget to mention the use of safety goggles and gloves when handling acids and heating solutions.

Always include the necessity of wearing safety goggles and gloves to protect against splashes and burns when working with acids and heating solutions.

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For Soluble salts, which exam wording answer best supports this Unit 4.4 objective: Describe safety precautions when using acids and heating solutions during salt preparation?