Chemistry Practice Question and Answer

Q:

The alkaloid naturally found in coffee, cocoa and colanut is

1310 0

  • 1
    Cocaine
    Correct
    Wrong
  • 2
    Morphine
    Correct
    Wrong
  • 3
    Tannin
    Correct
    Wrong
  • 4
    Caffeine
    Correct
    Wrong
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Answer : 4. "Caffeine"

Q:

An acid must contain mainly one atom which reacts with the metal to produce a gas.

1309 0

  • 1
    Hydrogen
    Correct
    Wrong
  • 2
    oxygen
    Correct
    Wrong
  • 3
    Nitrogen
    Correct
    Wrong
  • 4
    Ammonia
    Correct
    Wrong
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Answer : 1. "Hydrogen"

Q:

______fibre is used in making bullet proof vests.

1302 0

  • 1
    Nylon-66
    Correct
    Wrong
  • 2
    Terylene
    Correct
    Wrong
  • 3
    Kevlar
    Correct
    Wrong
  • 4
    Lexan
    Correct
    Wrong
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Answer : 3. "Kevlar"

Q:

Find the compound which undergoes nucleophilic substitution reaction exclusively by an SN1 mechanism

1297 0

  • 1
    Benzyl chloride
    Correct
    Wrong
  • 2
    Chlorobenzene
    Correct
    Wrong
  • 3
    Ethyl chloride
    Correct
    Wrong
  • 4
    Isopropyl chloride
    Correct
    Wrong
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Answer : 1. "Benzyl chloride "

Q:

What is the percentage of carbon in steel?

1292 0

  • 1
    3 %
    Correct
    Wrong
  • 2
    4 %
    Correct
    Wrong
  • 3
    2 %
    Correct
    Wrong
  • 4
    5 %
    Correct
    Wrong
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Answer : 3. "2 %"

Q:

How many carbon atoms are joined in buckminsterfullerene?

1279 0

  • 1
    30
    Correct
    Wrong
  • 2
    90
    Correct
    Wrong
  • 3
    60
    Correct
    Wrong
  • 4
    120
    Correct
    Wrong
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Answer : 3. "60"

Q:

What happens in most toothpastes to prevent tooth decay?

1279 0

  • 1
    Bromide
    Correct
    Wrong
  • 2
    Fluoride
    Correct
    Wrong
  • 3
    Iodide
    Correct
    Wrong
  • 4
    Chloride
    Correct
    Wrong
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Answer : 2. "Fluoride"

Q:

Which of these non-metals is shiny?

1265 0

  • 1
    Carbon
    Correct
    Wrong
  • 2
    Iodine
    Correct
    Wrong
  • 3
    Sulfur
    Correct
    Wrong
  • 4
    Bromine
    Correct
    Wrong
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Answer : 4. "Bromine"

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