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Which reagent used to test unsaturation ...

Which reagent used to test unsaturation of alkenes ?

A

Conc. `H_2SO_(4)`

B

Ammoniacal `Cu_2 Cl_2`

C

Ammoniacal `AgNO_3`

D

Solution of `Br_2` in C `Cl_4`

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The correct Answer is:
D
Solution of bromine in carbon tetrachloride is used to test for unsaturation of alkene. Red colour of bromine disappears due to the formation of colourless dibromo ethane `(C_2H_4Br_2)`.
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ERRORLESS-HYDROCARBONS-NCERT BASED QUESTION (ALKENE)
  1. When alocoholic solution of ethylene dibromide is heated with granulat...

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  2. n-propyl bromide on treatment with ethanolic potassium hydroxide produ...

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  3. Which reagent used to test unsaturation of alkenes ?

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  4. Which of the following yields both alkane and alkene ?

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  5. Alcoholic solution of KOH is used for ,

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  6. Which of the following reactions can be used for the synthesis of an a...

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  7. Cyclopentene on treatment with alkaline KMnO(4) gives

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  8. 2-chlorobutane is heated with alcoholic NaOH, the product formed in la...

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  9. When 2-chloro-2-methylbutane is heated with alcoholic KOH the possible...

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  10. What is obtained, when propene is treated with N-bromo succinimide :

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  11. The dehydrohalogenation of neopentyl bromide with alcoholic KOH mainly...

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  12. X in the above reaction is

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  13. The disappearance of the characteristic purple colour of KMnO(4) in it...

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  14. Dilute aqueous KMnO4 , at room temperature reacts with R-CH=CH-R to gi...

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  15. Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predomina...

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  16. Which of the following is not used to distinguish ethene from ethane

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  17. The compounds that will give an isomer of 2, 2-dimethyl propane on cat...

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  18. The Markovnikov rule is best applicable to the reaction between

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  19. CH(3)-CH - CH(2) + HBr rarr.........., the product formed is

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  20. The reaction CH(2) = CH(2) +H(2) underset(250-300^(@)C)overset("...

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