Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 4 | A Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Hhgb gg
Hhgb Gg

secondary 4 chevron_right A Maths chevron_right Singapore

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

Date Posted: 2 years ago
Views: 376
Eric Nicholas K
Eric Nicholas K
2 years ago
Needs to fit the molar ratio as well.

Got to form some equations!
Eric Nicholas K
Eric Nicholas K
2 years ago
Likely we need an organic compound with multiple double or triple bonds.
Eric Nicholas K
Eric Nicholas K
2 years 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
2 years 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
2 years 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.

See 1 Answer

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
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Tzu En
Tzu En's answer
134 answers (Tutor Details)
1st