Forwarded from Serene NotesChannel Κγ£β’α΄₯β’Κγ£ (Tahirah Sultana)
Chemistry with Rafiq β
Form 4 Chapter 2: Matter & Atomic Structure
COMMON MISTAKES MADE IN DRAWING QUESTIONS ββΌοΈβΌοΈ
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Form 4 Chapter 2: Matter & Atomic Structure
COMMON MISTAKES MADE IN DRAWING QUESTIONS ββΌοΈβΌοΈ
#chemistry #f4 #c2
-; β‘.Β° [ @serenenotes] ΰΜ₯
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Forwarded from Thespmneticβ’ π΅π»π΅π»ββ
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β€7
Which of the following will occur when glacial ethanoix acid is dissolved in propanone?
Anonymous Quiz
19%
A) Ethanoix acid ionises to produce hydrogen ions.
59%
B) The solution produced does not conduct electricity
9%
C) A dry litmus paper turns red when put into solution
12%
D) The effervescence occurs when calcium carbonate powder is added to the solution
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Antara yang berikut, yang manakah akan berlaku apabila asid etanoik glasial dilarutkan dalam propanon?
Anonymous Quiz
20%
Asid etanoik mengion untuk menghasilkan ion hidrogen
60%
Larutan yang terhasil tidak mengkonduksi-kan arus elektrik
13%
Kertas litmus biru kering bertukar kepada merah apabila dimasukkan ke dalam larutan
6%
Pembuakan berlaku apabila serbuk kalsium karbonat dimasukkan ke dalam larutan
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Which of the following is responsible for the acidic properties of sulphuric acid solution/Antara berikut, yang manakah bertanggungjawab bagi sifat said larutan said sulfurik
Anonymous Quiz
57%
HΒ²SOβ΄
21%
HΒ³O+
8%
OH-
14%
SOβ΄Β²-
β€4π2
Forwarded from droopy
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It teaches Add Maths, Physics and Chemistry, plus the quantitative and commerce subjects.
You talk to it in English, Malay or Tamil, and it explains the topic while a whiteboard draws the equations and diagrams as it goes.
It's like ChatGPT voice mode + live whiteboard
It's free for everyone, and credits get updated everyday and there is no payment gateway. SPM is close and a lot of students would find it helpful
Pick the topic you're stuck on and try it: math-flo.com
If it helps you, tell a friend. If something is wrong or missing, you can write a feedback
β€8π2
Forwarded from Physics Spmnetic!β’ π (Arron)
Hello,this will take 60 seconds to load the board as a one time thing,and then it will write simultaneously.
β€1
Which of the following properties of sodium hydroxide, NaOH, makes it unsuitable for the preparation of a standard solution?
Anonymous Quiz
21%
A) Volatile
31%
B) Hygroscopic
34%
C) Insoluble in water
14%
D) Chemically inert
β€1
Forwarded from Mathematics Spmnetic!β’ π’ (danisya)
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βοΈ Check your concept
β: Alcohol and alkali have the same -OH group. Therefore they have the same chemical properties.
β They may have the same -OH group. However, the -OH group in the alcohol molecule is not able to ionise to form free OH- ions. Therefore alcohol will not have the alkali properties of the hydroxide -OH^-.
β: Alcohol and alkali have the same -OH group. Therefore they have the same chemical properties.
β They may have the same -OH group. However, the -OH group in the alcohol molecule is not able to ionise to form free OH- ions. Therefore alcohol will not have the alkali properties of the hydroxide -OH^-.
β€12
βοΈ Check your concept
β: Any substance, which can decolourise acidified potassium manganate(VII), is an alkene.
β : An alcohol such as ethanol can also decolorise potassium manganate(VII) by oxidising it to an acid. Alcohol is not an alkene compound.
β: Any substance, which can decolourise acidified potassium manganate(VII), is an alkene.
β : An alcohol such as ethanol can also decolorise potassium manganate(VII) by oxidising it to an acid. Alcohol is not an alkene compound.
β€3
βοΈ Check your concept
β: Alkene burns with more soot. This is because each alkene has two hydrogen atoms less as compared to the corresponding alkane.
β : Alkene burns with more soot because the percentage of carbon is higher than in the corresponding alkane. (Fewer H atoms β higher C:H ratio β more unburnt carbon/soot.)
β: Alkene burns with more soot. This is because each alkene has two hydrogen atoms less as compared to the corresponding alkane.
β : Alkene burns with more soot because the percentage of carbon is higher than in the corresponding alkane. (Fewer H atoms β higher C:H ratio β more unburnt carbon/soot.)
β€1
π‘ THINK!
Q: If u heat a test tube using a Bunsen burner with its air hole closed, the side of the test tube will be black. Why?
A: Incomplete combustion occurs. Black carbon is deposited as soot on the side the walls of the test tube.
Q: If u heat a test tube using a Bunsen burner with its air hole closed, the side of the test tube will be black. Why?
A: Incomplete combustion occurs. Black carbon is deposited as soot on the side the walls of the test tube.
Exam tips π
You do not need to remember the value of the boiling points, melting points or densities of the different alkane compounds. However examination questions may require you to know the direction of change.
A hydrocarbon is a chemical compound. It is made up ofβ¦
Anonymous Quiz
6%
Carbon and water
87%
Carbon and hydrogen
4%
Carbon, hydrogen and nitrogen
3%
Carbon, hydrogen, nitrogen and oxygen.
β€2π1
π‘ THINK!
Petroleum and coal are the major raw materials for making plastics. If the earthβs supply of these raw materials is exhausted, where will the raw materials for plastics come from?
Petroleum dan arang batu merupakan bahan mentah utama untuk menghasilkan plastik. Jika bekalan bahan mentah ini di bumi kehabisan, dari manakah bahan mentah untuk plastik akan diperoleh?
Answer: From the biomass of dead plants and animals
Petroleum and coal are the major raw materials for making plastics. If the earthβs supply of these raw materials is exhausted, where will the raw materials for plastics come from?
Petroleum dan arang batu merupakan bahan mentah utama untuk menghasilkan plastik. Jika bekalan bahan mentah ini di bumi kehabisan, dari manakah bahan mentah untuk plastik akan diperoleh?
Answer: From the biomass of dead plants and animals
Roots Of Words
The word βorganicβ means from living things.
The word βorganicβ means from living things.