Question:
The characteristic colour of the flame of Barium salts is:
The characteristic colour of the flame of Barium salts is:
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Memorize the flame colours of common metal ions: Sodium - Yellow, Potassium - Lilac, Calcium - Orange-red, Barium - Apple Green.
Updated On: Jun 19, 2026
- Yellow
- Crimson
- Brick Red
- Apple Green
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the concept.
Barium salts, when heated in a flame, emit light due to the excitation of their electrons. The emitted light corresponds to a specific wavelength which is perceived as colour.
Step 2: Identifying the flame test colour.
The flame test is a qualitative analysis technique used to identify metal ions based on the colour of flame produced. For Barium salts, the flame exhibits a green colour.
Step 3: Reason for the colour.
The green colour arises because the electrons in Barium ions absorb energy and jump to higher energy levels. Upon returning to lower energy levels, they release energy in the form of green light.
Step 4: Comparing with other metals.
Other metals produce different characteristic colours in the flame test, e.g., sodium gives yellow, potassium gives lilac, calcium gives orange-red.
Step 5: Conclusion.
Hence, the characteristic colour of the flame of Barium salts is observed as apple green.
Barium salts, when heated in a flame, emit light due to the excitation of their electrons. The emitted light corresponds to a specific wavelength which is perceived as colour.
Step 2: Identifying the flame test colour.
The flame test is a qualitative analysis technique used to identify metal ions based on the colour of flame produced. For Barium salts, the flame exhibits a green colour.
Step 3: Reason for the colour.
The green colour arises because the electrons in Barium ions absorb energy and jump to higher energy levels. Upon returning to lower energy levels, they release energy in the form of green light.
Step 4: Comparing with other metals.
Other metals produce different characteristic colours in the flame test, e.g., sodium gives yellow, potassium gives lilac, calcium gives orange-red.
Step 5: Conclusion.
Hence, the characteristic colour of the flame of Barium salts is observed as apple green.
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