Question
How is carbon$-$carbon double bond in a compound detected by bromination?
✓
Answer
When an alkene like ethene is treated with bromine in presence of $CCl_4,$ the red$-$brown colour of bromine disappears due to following reaction.
Hence, decolourisation of bromine is used to detect the presence of $C = C$ bond in unknown compounds.
Hence, decolourisation of bromine is used to detect the presence of $C = C$ bond in unknown compounds.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Describe the industrial method of preparation of dihydrogen by electrolysis of pure water.
Define alkadienes and alkatrienes. Give one example for each.
It has been found that the Sun’s mass loss is $4.34 \times 10^9 $kg per second. How much energy per second would be radiated into space by the Sun ?
→Write dehydration reaction of 1°, 2° and 3° alcohols giving one example for each.
In which group should hydrogen be placed? In group 1 or group 17? Why?
Write a note on the characteristics of the $d-$block elements.
→How are hydrocarbons classified?
Derive the relation between density, molar mass and pressure.
Identify the nucleophile and electrophile from $NH _3$ and $\stackrel{+}{ C } H _3$. Also indicate the nucleophilic and electrophilic centres in them. Justify.
→Draw structures of following analgesics and write their molecular formula,
i. Aspirin
ii. Paracetamol
i. Aspirin
ii. Paracetamol