Jamb Chemistry CBT Practice Quiz (2021 Prep)

Jamb Chemistry Quiz

Welcome to Flashlearners Chemistry Quiz... Read Each Question Carefully And Choose The Best Answer From The Options. You May Click Here for Free Video Tutorials To Boost Your Score Or Simply Click Here To Access Thousands of Chemistry Questions Offline. Next To Begin...

1. Which of the following statements is FALSE?

copper (11) ion can be reduced to copper (1) ion by hydrochloric acid and zinc

Sodium metal dissolves in water giving oxygen

Nitrogen is insoluble in water

Carbon dioxide is soluble in water

2. Increasing the pressure of a gas

lowers the average kinetic energy of the molecules

decreases the density of the gas

decreases the temperature of the gas

increases the density of the gas

3. Liquid X, reacts with sodium trioxocarbonate (IV) (Na2CO3)Liquid X, reacts with sodium trioxocarbonate (IV) (Na2CO3) to give a gas which turns calcium chloride solution milky. X is

Na2SO4 (aq)

KI (ag)

An alkali

An acid

4. A gas that can behave as reducing agent towards chlorine and as an oxidizing agent toward hydrogen sulphide is

SO2

NH3

5. A jet plane carrying 3,000 kg of ethane burns off all the gas-forming waterA jet plane carrying 3,000 kg of ethane burns off all the gas-forming water and carbon dioxide. If all the carbondioxide is expelled and the water formed is condensed and kept on board the plane, then the gain in weight is

1,800kg

900kg

600kg

2,400kg

6. If an element has the electronic configuration 1s2 2s2 2p6 3s2 3p2 , it is

a metal

an alkaline earth metal

an s-block element

a p-block element

7. The molecular formula of X isAn unknown organic compound X has a relative molecular mass of 180. It is a colourless crystalline solid, readily soluble in water. X contains the element C, H, and O in the atomic ratio 1:2:1. The compound has aÂ sweet taste and melts on heating. In the presence of yeast and in the absence of air X is converted to compound Y in the absence of air, X is converted to compound Y and colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a €˜pop€™ sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W.

C12H22O11

C6H12O6

C3H6O3

C7H14O7

8. Which of the following happens during the electrolysis of molten sodium chloride?

Sodium ion loses an electron

Chlorine atom gains an electron

Chloride ion gains an electron

Chloride ion is oxidized.

9. Sweet-smelling Compound W. The Compound W is:An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystalline solid, readily soluble in water. X contains the element C, H, and O in the atomic ratio 1:2:1. The compound has aÂ sweet taste and melts on heating. In the presence of yeast and in the absence of air X is converted to compound Y in the absence of air, X is converted to compound Y and colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a €˜pop€™ sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet-smelling compound W.

A Soap

An Oil

An Alkane

An Ester

10. Solution X,Y, and Z have pH values 3.0, 5.0 and 9.0Solution X, Y, and Z have pH values 3.0, 5.0 and 9.0
respectively. Which of the following statements is
correct?

All the solution are acidic

All solution are basic

Y and Z are more acidic than water

Y is the least acidic

11. The mass of an atom is determined by

its ionization potential

its electrochemical potential

the number of protons

the number of neutrons and protons

12. Which of these shows a flaw in his report?In the preparation of some pure crystals of Cu(NO3)2 starting with CuO, a student gave the following statements as steps he employed.

Some CuO was reacted with excess dilute H2SO4

The solution was concentrated

When the concentrate was cooled, crystals formed were removed by filtration.

The crystals were washed with very cold water

13. Which of the following is neutralization reaction?

Addition of chloride solution

Addition of trioxonirate (V) acid (nitric acid) to distilled water.

Addition of trioxonirate (V) acid (nitric acid) to tetraoxosulphate (V1) acid (sulphuric acid).

Addition of trioxonirate (V) acid (nitric acid) potassium hydroxide solution

14. Which of the following pair of gases will NOT react further with oxygenWhich of the following pair of gases will NOT react further with oxygen at a temperature between 30°C and
400°C?

SO2 and NH3

CO2 and H2

NO2 and SO3

SO3 and NO

15. Number of molecules of water of crystallisation of the barium salt is2.5g of a hydrated barium salt gave on heating, 2.13g of the anhydrous salt. Given that the relative molecular mass of the anhydrous salt is 208, the number of molecules of water of crystallization of the barium salt is

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Comments

Jamb Chemistry CBT Practice Quiz (2021 Prep) — 76 Comments

khoidar on Mar 16, 2021 said:
good
Reply ↓
fidelis bassey on Mar 16, 2021 said:
wow i never new i can do this
i scored 100
isnt that great?
Reply ↓
- Anonymous on Apr 9, 2021 said:
  yes
  Reply ↓
Anonymous on Mar 6, 2021 said:
This is sincerely interesting
Reply ↓
Anonymous on Feb 23, 2021 said:
Wow this is very interesting I score 90%
Reply ↓
Oguntola usman Adewale on Feb 18, 2021 said:
I scored 40%
Reply ↓
Anonymous on Jan 17, 2021 said:
Fantastic
Reply ↓
- Hudhayfah Abdul razaq on Mar 24, 2021 said:
  From my own little knowledge, I think that number(11) question in chemistry does not correct, palm oil and water cannot be separated by fractional distillation because palm oil and water are not miscible liquid , but palm oil and water can be Separated by using separating funnel ,thanks.
  Reply ↓
Adebayo kayode on Oct 5, 2020 said:
Pls i need an update jamb news i beg,any information abt next comming jamb??
Reply ↓
Dammy on Oct 5, 2020 said:
Answers to some questions are wrong🤔
Reply ↓
- Isaac Inegbenehi on Oct 5, 2020 said:
  You can draft them out let’s discuss. Questions on the quiz are regularly reviewed and more questions are being added to.
  Reply ↓
  - Adebayo kayode on Oct 5, 2020 said:
    Hmm
    Reply ↓
God's son. on Jul 23, 2020 said:
Happy. Sir,radon is 4 d treatment of cancer and not argon. Argon is used in gas-filled electric lamp.
Reply ↓
- Isaac Inegbenehi on Jul 23, 2020 said:
  Thank you
  Reply ↓
Anonymous on Jul 22, 2020 said:
Fabulous
Reply ↓
Anonymous on Jul 22, 2020 said:
I am extremely happy and excited.I really appreciate sir,thank you.
Reply ↓
Anonymous on Jul 22, 2020 said:
I am sad,sir,pls check no:.12.p1v1/t1=p2v2/t2,the ans is 342 .5
Reply ↓
Anonymous on Jul 22, 2020 said:
Exuberant
Reply ↓
Da ni elle on Jul 19, 2020 said:
This is very helpful.Tnxz a lot…
Reply ↓
- Isaac Inegbenehi on Jul 19, 2020 said:
  I am glad you love the article
  Reply ↓

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Jamb Chemistry CBT Practice Quiz (2021 Prep)

Jamb Chemistry Quiz

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Comments

Jamb Chemistry CBT Practice Quiz (2021 Prep) — 76 Comments

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