7) Aqueous hydrogen peroxide is used to sterilise contact lenses. At room temperature, aqueous hydrogen peroxide decomposes very slowly to form water and oxygen. The decomposition can...
a) (i) Give evidence from the diagram which demonstrates that the above reaction is exothermic. ……………………………………………………………………………………………… (ii) Construct the balanced chemical equation for the above reaction....
Terephthoyl chloride and ethylene glycol react by polymerisation to produce a polymer called poly(ethylene terephthalate), commonly known as PET. PET is used to make soft...
Terephthoyl chloride and ethylene glycol react by polymerisation to produce a polymer called poly(ethylene terephthalate), commonly known as PET. PET is used to make soft...
Methane, CH4, is the major constituent of natural gas. (a) Draw a dot-and cross-diagram to show how the outer shell electrons are arranged in methane. (b) At a...
3 . Methane, CH4, is the major constituent of natural gas. (a) Draw a dot-and cross-diagram to show how the outer shell electrons are arranged in methane. ...
(a) Suggest why boron nitride with structure A can be used as a lubricant. ...
Several small pieces of magnesium are placed on a block of solid carbon dioxide. The solid carbon dioxide is at a temperature of -60 °C. The...
9. Cement is made by heating clay with crushed calcium carbonate. During this process, the calcium carbonate is first converted to calcium oxide. (a) Suggest why calcium...
2 . Sorrel is a small green plant. (a) The pigments in the sorrel leaf can be separated by chromatography. (i) Describe how chromatography can...
Although certain bacteria in the soil convert nitrogen gas into nitrates, other bacteria convert nitrogen into ammonium salts. The ionic equation for this second reaction is N2...
Although certain bacteria in the soil convert nitrogen gas into nitrates, other bacteria convert nitrogen into ammonium salts. The ionic equation for this second reaction is N2...
5 In the Periodic Table, how many periods include the elements of atomic numbers 1-18? A ...
9. Which graph shows the number of electrons in the outer shell of an atom, plotted against the proton (atomic) number for the first ten elements...
13 Which quantity is the same for one mole of ethanol and one mole of ethane? A. mass B....
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
The diagram below shows the path of a ray of light PQ in a glass block. Q is on the surface of the block. The diagram...
The diagram below shows the path of a ray of light PQ in a glass block. Q is on the surface of the block. The diagram...
As all of you know, There are different types of triangle, each with their own unique properties. So how do we actually differentiate them from one...
As all of you know, there are different types of triangles (Equilateral, Isosceles, and Scalene). That is one way we can classify the triangles which we...
As all of you know, there are different types of shapes we are all familiar with. Basic shapes such squares, rectangles, triangles or circles. Now, we...
Physics tuition classes in Miracle Learning Centre are easy to understand and help you to improve in your grades. If you do not understand Physics, you...
Did you know that Colon Cancer is the most common cancer across Singapore, according to the Ministry of Health? A precursor for Colorectal Cancer is adenomatous...
Biology tuition classes in Miracle Learning Centre are easy to understand and help you to improve in your grades. If you do not understand Biology, you...
A Chemistry tuition student at Miracle Learning Centre asked a teacher about this amazing phenomenon that she has seen on Instagram of a colour-changing drink at...
Biology tuition classes in Miracle Learning Centre are easy to understand and help you to improve in your grades. If you do not understand Biology, you...
PSLE Science Students need to KNOW your facts well. This may sound easy but you need to know your facts very well and what to focus on....
PSLE Science students need to take note of the following to ensure a high score for the PSLE science open-ended questions....
PSLE Science students need to be very careful and cautious about comparisons asked in the PSLE science questions. You have to clearly address these comparisons in...
PSLE Science students cannot us any shortcuts in their science answers. Answer have to be specific, well explained and the correct science keywords must be used....
PSLE Science students must take note of the following additional points when answering PSLE science questions....
PSLE Science students, please keep calm and take three deep breadth if you have not done/seen a PSLE science question before....
It is possible to identify a kinesthetic learner as he cannot sit still for long periods of time. He does not have good handwriting nor spelling...
The hassles of the daily grind can bring us immense stress that may lead up to erratic behaviour, and sometimes health related problems such as depression....
Your child is different from other children. He is unique, one of the kind. The way your child learns will be different from others. Hence, working...
Auditory learners are those who learn best through hearing. If you have noticed your child attentively listening and repeating after his/her favourite cartoon characters since young,...
Feeling the stress for your children in the upcoming PSLE examinations? Yet, your child does not seem to be much affected by their PSLE. They spend...
The hassles of the daily grind can bring us immense stress that may lead up to erratic behaviour, and sometimes health related problems such as depression....
Stress is part of everyday life due to the challenges posed by family commitments, financial obligations, and social relations. While experiencing some stress can actually motivate...
Physics tuition classes in Miracle Learning Centre is easy to understand and help you to improve in your grades. If you do not understand physics, you...
Physics tuition classes in Miracle Learning Centre is easy to understand and help you to improve in your grades. If you do not understand physics, you...
Physics tuition classes in Miracle Learning Centre is easy to understand and help you to improve in your grades. If you do not understand physics, you...
Physics tuition classes in Miracle Learning Centre is easy to understand and help you to improve in your grades. If you do not understand physics, you...
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