Skip to main content

More for You

How does Messi keep the ball close to himself

The science of how Messi keeps the ball close to himself photo credit: ZaleDesigns Messi is a magician with the ball at his feet. He's in my opinion the best player in the sense that he can control the ball so well, runs so fast with the ball & changes the direction at full speed like it's a walk in the park. For starters he started playing very early (at 3) which is crucial if you want to be a good player. In that aspect, he's God gifted as he had dribble skills which is genetic in my opinion. Height He is short which means a low center of gravity so it's difficult to push him off the ball. That's why we see that anyone rarely can topple him down, instead players much larger than him lose possession to him. So his short height suits his style of play & is a blessing in disguise. Change of pace Messi changes his pace really well. He starts slow and runs directly at the defender which means the defender has to stop & focus on him. When he reac...

jamb 2020/2021 chemistry likely questions

            CHEMISTRY LIKELY QUESTIONS IN                     2020/2021 JAMB 

by-by  



 In this essay, we'll look at what jamb will set in chemistry in 2021/2022, as well as some of the most commonly asked science questions.

So, today, I'm going to discuss some crucial points that all jamb applicants taking chemistry examinations in the 2020/2021 jamb should be aware of.



Francium: this chemicals element has an Atomic number of 87 and a symbol of French and it life span is just 22 minutes. . When going through jamb questions and answers I have seen this question pop up repeated times



DIAMOND: this is recognized as one of the most hardest substance/ carbon. I will like you to go through your text books and perhaps study everything about diamond

Hydrogenation: this word simply means to treat with hydrogen. Hydrogenation is usually use to deplete most organic compound.
Please note that when you Hydrogenate Alkynes you will get Alkanes

Do you know that the law of Definite Proportion and Constant Composition are the same? Should in case you don’t know please read this law and how they relate together.

Atomic number: I will advise you to study the periodic table carefully, if possible cram it because i have seen hundreds of questions that centered much on this area.

Electrons :study everything that has to do with electrons. Remember that electrons revolves around the atom.


Catenation: try to understand what the term Catenation is, note where they mostly occur.



Identify those elements that combine with carbon to form compound. I will list some here, please it’s your responsibility to read deeper in this areas.

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

TRY to understand why Pure substances have boiling and melting point

What jamb usually set in 2021/2022 chemistry

Jamb exam board are also 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 jamb might sets in 2020/2021 chemistry

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

  • Cyclic,
  • Acyclic
  • or Alicyclic.

Dmitri T. Mendeleev's 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)

They 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 2020/2021 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 uses this question to confuse candidates)

Thanks for reading.

SOURCE: The  original article is gotten from youwinconnect.org 

EDITED BY: timothy Thomas

Comments

RECENTS

explain the element copper

Chemistry - Copper Introduction Copper is a soft, ductile, and malleable metal. Copper has very high thermal and electrical conductivity. The symbol of copper is  ‘Cu’  and atomic number is  ’29.’ Copper is known to people since (about) c. 8000 BC. Copper is the first metal, which was smelted from its ore around c. 5000 BC. Salient Features of Copper Copper was the first metal that cast into a shape (in a mold). Copper was the first metal that successful alloyed with another metal, e.g. copper alloyed with tin and resultantly bronze is prepared. It is done about c. 3500 BC. First metal to be purposefully alloyed with another metal, tin, to create bronze, c. 3500 BC. Copper has a natural reddish-orange color; it is visible once the its surface is exposed. Copper is a very good conductor of electricity and heat. Copper is an element of group 11 of the periodic table. Copper normally does not react with water; however, it does react slowly with atmospheric oxygen and form a ...

explain the element platinum

Chemistry - Platinum Introduction Platinum is a malleable, ductile, dense, and highly unreactive chemical element. The symbol of platinum is  ‘Pt’  and its atomic number is  ‘78.’ The name of platinum is derived from a Spanish term i.e. ‘platina,’ which means " little silver ." Platinum is the most precious and the rarest metal (element) on the earth. Salient Features of Platinum Following are the important features of the platinum − Platinum is a silver white metal. Platinum is an element of group 10 of the periodic table. Platinum is one of the rarest elements in the crust of the earth. Platinum is one of the least reactive elements. Platinum has six natural isotopes. Platinum is one of the most highly valuable and precious metals. Platinum is characteristically resists corrosion in all conditions. Because of this reason, it is considered as noble metal. Platinum is normally insoluble in nitric and hydrochloric acid, but dissolves in hot  aqua regia . After dissolv...

How can I study for my chemistry Exam

  how to study chemistry by science question and answers Chemistry is one of those subjects that you either enjoy or despise. Chemistry is usually not a required course in high school, but rather an elective. Most reputable universities, on the other hand, require all undergraduate students to take at least one chemistry course in order to graduate. If you want to work in medical, engineering, or a branch of natural science, you'll almost certainly have to take at least one chemistry course before graduating. For most people, chemistry is a difficult topic, but it doesn't have to be. Here are some tips I have for you to make you study and pass any chemistry exam.          1.     Before going to class, review and study the material . a student studying In a traditional learning approach, students come to class, the lecturer explains the content, elaborates on key concepts, assigns additional readings and assignments, and the session closes. St...