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Key Points In Chemistry For JAMB 2023/2024

Key Points In Chemistry For JAMB 2023/2024 Here are some main key Points In Chemistry For JAMB 2023 that you should consider.

In this article, I shall share lights on some main focus topics that you need to consider in chemistry for the JAMB 2023/2024. I shall share info about frequently asked Chemistry questions from the previous years, questions that might be asked and those that mostly come out.

Key Points In Chemistry For JAMB 2023/2024

Below are the main key points and topics to focus on when reading for the JAMB 2023/2024 Examination.

1. The most reactive metal known is Francium.

2. GEL is an SOL which contains more solid particle dispersed in liquid than usual.

3. The hardest substance known to man is DIAMOND.

4. The lowest Oxidation State of IRON is ZERO

5. Quantum Numbers only describes ELECTRONS and not ATOMS.

6. Hydrogenation of Alkynes gives Alkanes

7. The Law of Definite Proportion is also referred to as the law of Constant Composition.

8. Sodium liberates H2 from Water = False.

*Sodium liberates H2 from Steam = True

9. The electrolyte used in DOWN CELL is Molten NaCl fused with Cacl2

10. Na is not stored under water because it Tarnishes.

11. Burning Kerosene gives CO2 + H2O

12. Dissolution of Calcium in water gives CaO.

13. All Nitrates are Soluble in water. Also, all nitrates unstable to heat.

14. N2O is the first Anaesthetic man ever used.

15. The flame used by welders is called Oxy-acetylene flame

16Consecutive members of the Alkane homologous series differ by CH2.

17. The difference between drying and dehydration is that drying is removal of water while dehydration is the removal of elements of water (Hydrogen and oxygen).

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18Benzene is an Aromatic hydrocarbon.

19Atomic mass is the mass of proton and neutron in the nucleus of an atom.

20. Atomic number is the number of Electron an atom has.

21. Electrons revolve around the atom while Proton and Neutron are inside the Nucleus of the Atom.

22Radioactivity is the spontaneous disintegration of the nuclei of an atom to emit energy and radiations such as ALPHA PARTICLES, BETA PARTICLES AND GAMMA RAYS.

23. Alpha particles have the least penetrating power. Beta particles can be stopped by Aluminium foil while Gamma rays can only be stopped by LEAD BLOCK.

24. The ability of CARBON to form long chains, branched chains and ring is called catenation.

25. Elements that can combine with carbon to give compounds are:

  • Hydrogen
  • Oxygen
  • Chlorine
  • Nitrogen
  • Bromine
  • Phosphorus

26Aliphatic Hydrocarbons could be Cyclic, Acyclic or Alicyclic.

27Pure substances have definite boiling point and melting point.

28. Example of radioactive material are Uranium, Thorium and Polonium.

29. The most notable scientist who contributed to the development of  Periodic table between 1817 ti 1895 was Dmitri T. Mendeleev

30. The fourth and fifth period contains 18 elements each.

31. Elements in the same group are called CONGENERS.

32Free Hydrogen (H2) is the lightest gas known.

33Viscosity is the resistance to flow in liquids.

34. Water starts boiling when the saturated vapour pressure is equal to the atmospheric pressure.

35Factors affecting boiling points of organic compounds are branching, volatility, polarity and impurity.

36. The most reactive nonmetal known is fluorine.

37Impurity increases boiling point but reduces melting point.

38. Ernest Rutherford is the father of nuclear science.

39Radioactivity can also be called transmutation.

40NUCLEAR ENERGY is produced by Nuclear fission and Nuclear fusion.

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41Energy from the Sun is as a result of Nuclear fusion but reaches the earth via Radiation (Correction Credit: Saheed Soneye).

42. The two types of radioactivity are natural radioactivity and artificial radioactivity.

43. Every nucleus is positive.

44. For solid which sublime, sublimation can be used to isolate the solid from its impurities if the impurities themselves do not sublime.

45CRAO.. Reduction takes place in cathode and oxidation occurs in the anode.

46. Compound that rotates plane polarised light is said to be optically active.

47. Cathode ray tube was the forerunner of of today’s television tube.

48. R.A Millikan found the charge of an electron to be -1.60×10-19C

49. Antoine Becquerel discovered Radioactivity while Marie Curie suggested the name “Radioactivity”.

50. Each Hydrogen spectrum produces six series and each series produces lines while each line has specific wavelength.

Similar Content :-

30 Most Likely Repeated Questions In JAMB Chemistry 2023

 

FAQs

What Are The Frequently Asked Questions In JAMB From The Previous Years?

You actually can’t do without asking about the frequently asked questions from JAMB Chemistry from the previous years but no worries! Below are the compiled frequently asked questions in JAMB chemistry from the previous years:

Jamb exam board are known to ask questions on radioactive material. But example of radioactive material are:

  • Uranium,
  • Thorium
  • Polonium.

Viscosity: this means internal friction in fluid

When you Dissolves Calcium in water you get CaO.

Read more about the invention of Cathode ray tube whose idea was what gave birth to what we know as television.

Oxy-acetylene flame is mostly used in welding or joining two metals

Find out more information about R.A Millikan he stated that charge of an electron to be –1.60×10-19C(I have seen this question like 15 times in past jamb chemistry questions)

What Are The Questions That Might Be Asked In The JAMB Chemistry For 2023/2024?

Note the form in which Aliphatic Hydrocarbons can exist.. Let me help you here they are:

  • Cyclic,
  • Acyclic
  • or Alicyclic.
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Dmitri T. Mendeleev:study how he contributed to the development of the periodic table

CONGENERS: please understand what this term means and examples ( element in the same group)

JAM might ask you “what is the lightest gas?” Just have it in mind that it is Free Hydrogen (H2)

Understand the concept on how water boil (saturated vapor presure = atmospheric pressure)

List factors affecting the boiling point ( study this point very well) let me help you to list them

  • volatility,
  • polarity
  • impurity.

Always understand that nuclear energy comes from nuclear fusion

What jamb sets in 2023/2024 chemistry

And also understand that the sun energy is as a result of nuclear fusion

Another name for transmutation is still the same as Radioactivity

Understand that Florin is one of the most reactive non metal

Always have it in mind that nucleus is positive

Study about natural and artificial radioactive.

Do you know that zero is the lowest oxidation state of Iron? Please have this at the back of your mind

Read about the history of radioactive and who suggested the name (Marie Curie) and who discovered it (Antoine Becquerel)

Please understand that Quantum Numbers don’t point to atoms but ELECTRONS… (JAMB Always use this question to confuse candidates yearly)

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