Igcse Model Questions Vol1 2019 Chemistry Question 2

Practice practical question 2 from the 2019 Igcse Model Questions Vol1 Chemistry examination. This question covers Periodic table, Flame test, Electron transitions, Identification of elements .

Igcse Model Questions Vol1 2019 Chemistry Practical

Topics: Periodic table Flame test Electron transitions Identification of elements

Question 2 IGCSE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • practical

A student carries out a flame‑test investigation using a Bunsen burner. Small amounts of the following solid salts are placed separately on a clean platinum wire loop and introduced into the flame: • Sodium chloride (NaCl) • Potassium chloride (KCl) • Calcium chloride (CaCl₂) • Barium chloride (BaCl₂) The observed flame colours are recorded. An unknown solid sample is then tested in the same way and produces an orange‑red flame.

Question Parts

( a )

State the characteristic flame colour expected for each of the four known salts.

( b )

Based on the observed colour of the unknown sample, suggest which metal ion(s) are most likely present.

( c )

Explain, in terms of electron transitions, why different metal ions give different flame colours.

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About This Question

This is Igcse Model Questions Vol1 2019 Chemistry Question 2. It is one of the practical questions from the 2019 Igcse Model Questions Vol1 Chemistry examination.

The question covers Periodic table, Flame test, Electron transitions, Identification of elements .

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