After communicating with several students, i realised that many come to this Chemistry blog to look for more O Level Chemistry Questions and Solutions/Answers. In fact, you can find them at “Chemistry Notes & Tips” under CATEGORIES on the right hand side column of this blog. Seems like many students are not sure how to find the topics of their interest.
We have decided to improve on the interface of this Chemistry blog in following weeks to make it easier for Chemistry students to maximise their learning. Stay Tuned for it!
Meanwhile, if you are looking for specific O Level Chemistry Topics (or other basic Chemistry syllabus), check the following links for wealth of information and tips:
- Experimental Techniques
- Purification & Separation
- Kinetic Particle Theory
- Elements, Compounds & Mixtures
- Atomic Structure
- Chemical Bonding
- Balancing Chemical Equations
- Acids & Bases
- Preparation of Salts
- Qualitative Analysis (QA)
- Mole Calculations
- Periodic Table & Group Trends
- Rate of Reaction
- Energy Changes
- Redox Reaction
- Electrolysis
- Metals & Reactivity Series
- Organic Chemistry
- Macromolecules
- Air & Atmosphere
- Ammonia
- SPA / Chemistry Practical Tips
If you are looking for other topics that is not listed above, do a search on the top right hand corner (i.e. search box) of this blog.
Enjoy reading this blog and improve your Chemistry knowledge and grades! 🙂
PS: Feel free to drop me a comment OR forward this blog to your friend
Related Articles:
- Mole Calculations – No. 1 Killer in O Level Chemistry?
- Chemistry Tips: How to Revise for your GCE ‘O’ Level Chemistry Exams
- O Level Chemistry – Periodic Table Mini Series (Part I)
- O Level Chemistry – Secrets of Acids, Bases & Salts & Qualitative Analysis revealed!
- O Level Chemistry: Mole Concepts / Mole Calculations
sir i am a student from Pakistan.
i have a kind request that can u tell me some important tips about chemistry exam.
U are very good at helping us understand these subjects much better
Hi Sabahat ali,
I am not sure which level of Chemistry you are learning right now but in general, no one will mention that one type of bond is stronger than the other.
This is because there are strong covalent bonds as well as weaker covalent bonds.
Similarly, there will be stronger ionic bonds as well as weaker ionic bonds.
Any type of comparison will be unfair and inaccurate unless you have experimental data.
Usually, we compare ionic/covalent bonds versus WEAK intermolecular Van der waals’ forces of attraction.
Hope the above helps!
Sean Chua
sir can you please help me understanding the concept that which bond is more strong ionic or covalent? since now i have been studying that ionic bond is more strong due to he strong electrostatic force of attraction..but recently i have come to a concept that covalent bond is more stronger than than ionic..can you please guide me in this regard.?
thankyou
sabahat ali
sir my question to u is i have problem in understanding the difference between ionic bounding and covenant bounding basically by diagram. so plzz can u briefly explain that…..and which type questions basically deal with atomic structure.
Dear Fatima,
No one will be able to predict what will be coming out for 2014 Chemistry paper.
I tell my students to understand ALL the key concepts in each topic and not spot any topic/questions.
Having said that, i am seeing following trends:
1) Question in Written Paper tends to be more cross-topics
2) Question on Pollution, Energy Saving, Economics are quite common
3) Flow-charts are coming back
Hope the above helps.
Enjoy your learning process!
Sean Chua
can u give an overall opinion on what kind of questions are likely to come in 2014 chemistry(5070) exam? I have prepared holistically but would appreciate an expert opinion?
i like chemistry topics.
i invite all my friends to join chemistry
ammmm, its good to have a nice site for some of the chemistry questions especially the O and A questions and answers because its really cool and attractive to any high school student
Or we may use take the time needed for the potassium permanganate to decolorize with known concentrations of iron(II) ions (or for the solution to turn reddish-brown/pale yellow). Plot a best-fit curve and repeat the whole experiment again with the unknown concentration of iron(II) ions. Lastly, read the concentration of your graph. However this method is seldom used in Chemistry, but it can work though. It may be used in Biology to check the blood plasma glucose concentration as glucose is also a reducing agent.
I guess we have to say ACIDIFIED potassium manganate(VII) in order to have the colour change from purple to colourless. In neutral or alkaline condition, brown precipitate of manganese(IV) oxide, MnO2 is obtained instead.
Hi saba,
Although titration is carried out in this example, this chemistry question should be placed under the chapter of “REDOX: Reduction & Oxidation”.
Fe2+ are very good reducing agent.
KMnO4 is commonly used to test for a reducing agent.
In this case, KMnO4 change from Purple to Colourless.
Hope this information helps.
To Your Academic Success in Chemistry,
Sean Chua
Master Trainer @ SimpleChemConcepts.com
Author of Up Your Chemistry Grades Now! book
what’s the color change at da end of a titration experiment with fe 2+ ions and potassium manganate? explain please!!