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secondary 4 | A Maths
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Why is ans not A? I tot alkenes undergo additional reaction to form single bonds that are saturated?

Date Posted: 1 year ago
Views: 333
Eric Nicholas K
Eric Nicholas K
1 year ago
Needs to fit the molar ratio as well.

Got to form some equations!
Eric Nicholas K
Eric Nicholas K
1 year ago
Likely we need an organic compound with multiple double or triple bonds.
Eric Nicholas K
Eric Nicholas K
1 year ago
C3H6 ==> C3H6Br2
(Basically, three C and eight “slots” for things like H and Br)

C4H6 ==> C4H6Br4
(Basically, four C and ten “slots” for things like H and Br)

C5H8 ==> C5H8Br4
(Basically, five C and twelve “slots” for things like H and Br)

C6H8 ==> C6H8Br6
(You know what to do for this one)
Eric Nicholas K
Eric Nicholas K
1 year ago
Which one adds three of Br2?

The one with six bromine atoms added.

Which compound has six bromine atoms added?
Eric Nicholas K
Eric Nicholas K
1 year ago
The general formula for alkenes, CnH2n, are for standard alkenes with one C=C double bond.

There are alkenes out there with multiple C=C double bonds also. These are said to be polyunsaturated and they do not follow the general formula above.

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You are right in saying that option A C3H6 will undergo additional reaction with bromine to form saturated compound (C3H46Br2). However do note that the question says 1 mole of compound reacted with 3 moles of Br2. If answer is A, the question would be 1 mole of compound reacting with 1 mole of Br2
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Tzu En
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