Question detail

For Identification of ions by chemical and spectroscopic means, which option uses the correct Chemical analysis evidence for metal ion test?

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

Identification of ions by chemical and spectroscopic means

Question

A. Aluminium
B. Copper(II)
C. Calcium
D. Magnesium

Answer

The correct answer is Copper(II). It matches metal ion test because the evidence is precipitate observation and the expected result is cation identity.

Explanation

The correct option is Copper(II). This response is stronger than the distractors because it keeps the test, observation, and interpretation in the correct order for metal ion test. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.

Common mistake

Confusing Sodium Hydroxide Tests

Students often confuse the results of sodium hydroxide tests for different metal ions, such as assuming all produce a white precipitate.

Correct this by using the approved Metal hydroxide precipitate tests context: Describe how sodium hydroxide solution can be used to test for some metal ions. Name the correct test or chemistry idea, state the observation accurately, and then give the conclusion supported by that evidence. Do not swap gas tests, flame tests, cation tests, anion tests, chromatography terms, pure substances, and formulations.

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