Comments on: GCE O Level 2011 Oct/Nov Combined Science (Physics/Chemistry) 5116 MCQ Paper 1 Suggested Answers & Solutions

By: herhappyness

herhappyness — Fri, 18 Nov 2011 12:58:17 +0000

i want the bio answers

By: Jamie

Jamie — Wed, 16 Nov 2011 16:28:03 +0000

Could you upload the Pure Biology Paper 1 answers as well?

By: Little Miss Loi

Little Miss Loi — Wed, 16 Nov 2011 08:58:12 +0000

It may be a wee bit difficult trying to visualize boiling points on a negative temperature scale, but hopefully the following diagram will clear things up: At −200°C, we are above the boiling points of helium (−269°C) and neon (−246°C), hence they are still gaseous. At −200°C, we are below the boiling points of argon (−186°C), nitrogen (−196°C) and oxygen (−183°C), hence they are in liquid state.

By: ayumu

ayumu — Wed, 16 Nov 2011 07:10:40 +0000

why is question 22 the answer B instead of C ??

By: Joshua

Joshua — Wed, 16 Nov 2011 05:47:38 +0000

Any idea how the Bell curve is gonna be for Combined science this year?

By: Little Miss Loi

Little Miss Loi — Wed, 16 Nov 2011 05:13:13 +0000

Q20 is D because the magnetic field strength will weaken with distance from the wire as depicted by the magnetic field lines moving further apart away from the wire.

We can't have A as we can't have a uniformly strong magnetic field that goes on and on and on ... unless we're talking about the X-Men Magneto (but even then ...)

By: Edwin

Edwin — Wed, 16 Nov 2011 04:48:58 +0000

Why is question 20's answer 'D' , but not 'A' ?

By: Little Miss Loi

Little Miss Loi — Tue, 15 Nov 2011 06:12:18 +0000

Yes magnesium is less reactive compared to sodium or potassium but sodium and potassium are not among the four metals (iron, lead, magnesium and zinc) that are used in Q33.

So out of the four metals, magnesium is the most reactive, and will produce the most number of bubbles in the test tube.

By: Hanisah Kamarudin

Hanisah Kamarudin — Tue, 15 Nov 2011 01:22:11 +0000

@Hafizwhiz http://t.co/9JUBkGQf

By: elaine

elaine — Mon, 14 Nov 2011 17:57:04 +0000

for qus 33 why is the ans not D but C.Magnesium is less reactive as compared to sodium or pottasium