GCE O Level Tuition

One of the more commonly asked question is the classification of vector and scalar quantities.

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Basically we know that vector quantities has both magnitude (value like 2m/s, 400m etc) and direction (which means there is a possible of positive or negative figures like -5.2m/s).

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Fortunately, an easy rule can help us to remember them.

Most of us can remember the 3 usual suspects

DISPLACEMENT, VELOCITY AND ACCELERATION.

The last member of this select group is FORCE.

Basically anything that has the unit of NEWTON, we can safely classify it under vector quatity. For example, friction, weight, pulling force, pushing force, contact force etc. The list can go on and on. You get the drift.

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Which brings us to scalar, quatities which has magnitude and no direction. Since we are able to classify vectors, simply label the other components as scalar. Its that ez!

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Json

www.oleveltuition.com

Dear all doing acids for this exam,

for reactions of acids, refer to this link.

http://olevelchemistry.blogspot.com/2009/08/acid-reactions-part-1.html

for oxide types

http://olevelchemistry.blogspot.com/2009/08/types-of-oxide.html

for salt making

http://olevelchemistry.blogspot.com/2009/08/salt-making-selection-of-method.html

Will be adding a more keep in view

Regards

Json

Chemistry

1-10

B C A A B D D B C D

11-20

A D C B C B B B D A

21-30

C D D C A A B D C B

31-40

D A C D D B D C B C

Physics

1-10

B C C B A D D B D A

11-20

A A D D A B C D B D

21-30

B D B D B D B A C A

31-40

C D C B A A B C D C

To er is human, if you suspect any wrong answers, dont struggle gimme a text i will check. Enjoy and remember 3 ilttle pigs.

A piece of history for all of you, why Raffles named our beloved Island City, Singapore ............ possibly.

Chemistry MCQ Topics, 10 Questions

1)Gas collection, Volume Measurement, Apparatus

2)Seperation Techniques, Kinetic Particle Theory

3)Atomic Structure, Bonding

4)Periodic Table

5)Metals

6)Mole Calculations

7)Acid Bases Salts

8)Rate of Reactions

9)Redox

10)Heat Changes

Physics MCQ Topics, 10 Questions

1)Kinetics

2)Dynamics

3)Moments

4)Pressure

5)Power, Energy

6)Heat Transfer

7)Heat Calculations, Thermometry

8,9)Electricity Calculations

10)Static Electricity

If the topics are not being taught yet, do worry just do whatever you can. Enjoy and have fun.

From Nicole today, she asked if HCl should be considered an ionic or covalent substance, should it possess ionic or covalent properties.

The answer is very simple, HCl is a simple covalent molecule. It is bonded covalently so it has the standard properties of simple covalent molecules.

This link http://www.gcsescience.com/Hydrogen-Chloride-Molecule.gif shows you the dot and cross structure of HCl. Furthermore, its made up of 2 non-metal atoms. All these evidences points to simple covalent properties.

However, HCl being an acid, will ionize in water producing hydrogen and chloride ions. Hence despite being a covalent molecule, it is able to conduct electricity in the aqueous state. Hence acids hold the distinction of having and being covalent properties in nature but still conduct electricity.

Information correct as of O levels, A level chemistry has a different story all together

There has been a lot of queries about how to prepare the tasty! wanton i made for my tuition students. So this is the recipe revealed!!