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Question

Certain inorganic salt, when introduced in flame produces crimson red colour. It indicates the presence of

A
Dichromate ion
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B
Thiosulphate
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C
Strontium
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D
Calcium
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Solution

The correct option is C Strontium
The flame test color for strontium is the red of emergency flares and red fireworks. It's a deep crimson brick red.
Barium salts produce a green flame in the flame test.
Manganese(II) and molybdenum may also yield yellow-green flames.
Copper(II) produces a green flame.
Copper(I) salts produce a blue flame test result.
Boron colors a flame bright green.

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