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. The flame used by welders in cotton metals is

butane gas flame

acetylene flame

kerosene flame

oxy-acetylene flame

2. 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

3. A piece of burning sulphur will continue to burn in a gas jar of oxygenA piece of burning sulphur will continue to burn in a gas jar of oxygen to give misty fumes which readily dissolve in water. The resulting liquid is

sulphur (1V) trioxide

Tetraoxosulphate acid (V1)

Trioxosulphate (1V) acid

Dioxosulphate (11) acid

4. The three-dimensional shape of methane is

hexagonal

trigonal

linear

tertrahedral

5. 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

6. How many isomeric forms are there for the molecular formula C3H6Br2 ?

7. A mixture of common salt, ammonium chloride and barium sulphate can best be separated by

addition of water followed by filtration then sublimation

addition of water followed by sublimation then filtration

sublimation followed by addition of water then filtration

fractional distillation

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. Which of these metals, Mg, Fe, Pb, andCu will dissolve in dilute HCI?

All the metals

Mgm Fe, and Cu

Mg, Fem and Pb

Mg and Fe only

10. The cracking process is very important in the petroleum industry because it

gives purer products

Yields more lubricants

Yields more asphalt

11. 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

12. The alkanol obtained from the production of soap is

ethanol

glycerol

methanol

propanol

13. Consecutive members of an alkane homologous series differ by

CH2

CH3

CnHn

14. The mass of an atom is determined by

its ionization potential

its electrochemical potential

the number of protons

the number of neutrons and protons

15. 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

16. An element is electronegative if

it has a tendency to exist in the gaseous form

its ions dissolve readily in water

it has a tendency to lose electrons

it has a tendency to gain electrons

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

SO2

NH3

18. Reaction of X with yeast forms the basic of theAn 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 colorless 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.

plastic industry

textile industry

brewing industry

soap industry

19. 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

20. Which of the following separation processes is most likely to yield high-quality ethanol (>95%) from palm wine?

Fractional disllation without a dehydrant

Simple distillation without a dehydrant

Fractional distillation with a dehydrant

Evaporation

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Comments

Jamb Chemistry CBT Practice Quiz (2021 Prep) — 69 Comments

Anonymous on Jan 17, 2021 said:
Fantastic
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 ↓

Jamb Chemistry Quiz

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