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| Q. |
During combustion of unsaturated compounds a is seen. |
| A. | clean flame |
| B. | blue flame |
| C. | red flame |
| D. | yellow flame |
| Answer» D. yellow flame | |
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Explanation: When saturated compounds are burnt in air,they give a clear(blue) flame due to complete combustion. However the burning of unsaturated compounds (alkenes and alkynes) gives a sooty (yellowish) flame due to incomplete combustion. |
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