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Waec Chemistry CBT Quiz

Updated on November 25, 2021 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. 
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 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. 
The alkanol obtained from the production of soap is
3. 
The mass of an atom is determined by
4. 
Which of the following separation processes is most likely to yield high-quality ethanol (>95%) from palm wine?
5. 
Which of the following is neutralization reaction?
6. 
Number of molecules of water of crystallisation of the barium salt is
2.5g 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
7. 
Which of the following happens during the electrolysis of molten sodium chloride?
8. 
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.
9. 
The colour imparted to a flame by calcium ion is
10. 
The cracking process is very important in the petroleum industry because it
11. 
Which set-up in the following for the extraction of iron copper and Aluminum is correct?
Some metals are extracted from their ores after some preliminary treatments by electrolysis (L) some by thermal reaction(T) and some bya combination of both processes(TL).
12. 
Increasing the pressure of a gas
13. 
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
14. 
Which of these metals, Mg, Fe, Pb, andCu will dissolve in dilute HCI?
15. 
If an element has the electronic configuration 1s2 2s2 2p6 3s2 3p2 , it is
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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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