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WAEC Chemistry CBT Quiz

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Modified On Oct 20, 2022 By Isaac

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 molecular formula of X 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 a 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.

2. 
Which of the following statements is FALSE?

3. 
How many isomeric forms are there for the molecular formula C3H6Br2 ?

4. 
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

5. 
The alkanol obtained from the production of soap is

6. 
Solution X,Y, and Z have pH values 3.0, 5.0 and 9.0

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

7. 
If an element has the electronic configuration 1s2 2s2 2p6 3s2 3p2 , it is

8. 
An element is electronegative if

9. 
Stainless steel is an alloy of

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

11. 
Which if the following solution will give a white precipitate with barium chloride solution and a green flame test?

12. 
In which of the following processes is iron being Oxidized?

  1. Fe + H2 SO4 †’H2 + FeSO4
  2. FeSO4 + H2S †’ FeS + H2 SO4
  3. FeCl + CI2 †’2FeCL3
  4. FeCl3 + SnCI2 †’2FeCL2 + SnCI4

13. 
A gas that can behave as reducing agent towards chlorine and as an oxidizing agent toward hydrogen sulphide is

14. 
Zn + H2SO4 ➡ ZnCI2 + H2

The rate of the above reaction will be greatly increased if...

15. 
A jet plane carrying 3,000 kg of ethane burns off all the gas-forming water

A 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

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4 Comments

  1. Barinaale Dogala says

    It’s helpful alot rather

    Reply
  2. Barinaale Dogala says

    It’s so good
    It helpful alot

    Reply
  3. Ayomide oyedele says

    It was helpful

    Reply
  4. EMMANUEL RIMAMSITSE says

    JAM QUESTION

    Reply

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