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Question
Which of the following is a greenish yellow gas having an irritating choking and unpleasant odour?
Which of the following is a greenish yellow gas having an irritating choking and unpleasant odour?
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Solution
The correct option is C Chlorine
Chlorine is a greenish yellow gas that is highly toxic. Poisoning by chlorine gas causes severe respiratory problems that lead to difficulty in breathing and even death. Thus correct option is (c).
This is due to the absorption of radiations in visible region, which results in the excitation of outer electrons to a higher energy level. By absorbing different quanta of radiation, they display different colours.
Element
Colour (at room
temperature)
F
Pale green-yellow gas
Cl
Greenish yellow gas
Br
Reddish brown liquid
I
Dark violet solid
Chlorine is a greenish yellow gas that is highly toxic. Poisoning by chlorine gas causes severe respiratory problems that lead to difficulty in breathing and even death. Thus correct option is (c).
This is due to the absorption of radiations in visible region, which results in the excitation of outer electrons to a higher energy level. By absorbing different quanta of radiation, they display different colours.
| Element | Colour (at room temperature) |
| F | Pale green-yellow gas |
| Cl | Greenish yellow gas |
| Br | Reddish brown liquid |
| I | Dark violet solid |
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