Two reactions of an alkene, B, are shown below.?

Question

Two reactions of an alkene, B, are shown below.

http://i156.photobucket.com/albums/t3/drummerbyday/1111111111.jpg

(i) State the name of A and write an equation for its complete combustion. Explain why the incomplete combustion of A is dangerous.

(ii) Outline a test to distinguish between A and B, stating the result in each case.

(iii) Write an equation for the conversion of B to C. State the type of reaction taking place and draw the structure of C.

Answer 1

(i) cis-prop-2-ene, it is dangerous because it produces carbon monoxide, which is posionous.

C4H8+4O2--->4H2O+4CO

(ii) Add bromine water to a sample of each, the alkene, B, will discolour it rapidly and without the need for a catalyst, while the alkane, A, will discolour it very slowly and needs uv light as a catalyst.

(iii) CH3CH=CHCH3+HBr--->CH3CH2CHBrCH3

And its an addition reaction

Hope that helps.

Answer 2

Hi,you're scan is kind of blurry so I don't know what to make of it, you might want to try to type it or make it more clear...maybe do it on large on word and print screen it..

Answer 3

i) butane 2C4H10+13O2-> 8CO2+10H2O

It is dangerous because carbon monoxide is produced which result in the reaction with haemogoblin and a loss of oxygen.

Test them against bromine to see if there is a colour change. It it is an alkane,there is no colour change. If it is an alkene, Bromine water is decolourised.

C4H8+HBR-> C4H9BR

radical addition

C4H