Chemistry General Knowledge Questions Practice Question and Answer

Q:

Read the following questions carefully and answer them. 

Polythene is polymer of

685 0

  • 1
    Ethylene
    Correct
    Wrong
  • 2
    Propylene
    Correct
    Wrong
  • 3
    Acetylene
    Correct
    Wrong
  • 4
    Aniline
    Correct
    Wrong
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Answer : 1. "Ethylene "

Q:

A proton donor is a ____________ substance.

678 0

  • 1
    Proton genic
    Correct
    Wrong
  • 2
    Photophilic
    Correct
    Wrong
  • 3
    Amphoteric
    Correct
    Wrong
  • 4
    Amphiprotic
    Correct
    Wrong
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Answer : 1. "Proton genic"

Q:

Read the following questions carefully and answer them. 

Curd is sour due to presence of

655 0

  • 1
    Tartaric acid
    Correct
    Wrong
  • 2
    Lactic acid
    Correct
    Wrong
  • 3
    Acetic acid
    Correct
    Wrong
  • 4
    Oxalic acid
    Correct
    Wrong
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Answer : 2. " Lactic acid "

Q:

Which of the following is/are the example/examples of chemical change? 

(1) . Crystallization of sodium chloride 

(2) . Melting of ice 

(3) . Souring of milk 

Select the correct answer using the code given below. 

646 0

  • 1
    3 only
    Correct
    Wrong
  • 2
    1, 2 and 3
    Correct
    Wrong
  • 3
    1 and 2 only
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "3 only "

Q:

Which of the following substances cannot act as both acid as well as a base?

644 0

  • 1
    Amphoteric substance
    Correct
    Wrong
  • 2
    Amphiprotic substance
    Correct
    Wrong
  • 3
    Ampholyte
    Correct
    Wrong
  • 4
    Photophilic
    Correct
    Wrong
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Answer : 4. "Photophilic"

Q:

Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens?

635 0

  • 1
    To increase the concentration of NO3- ions
    Correct
    Wrong
  • 2
    To increase the solubility product of AgCl
    Correct
    Wrong
  • 3
    It increases the precipitation of AgCl
    Correct
    Wrong
  • 4
    For the decomposition of Na2S AND NaCN formed
    Correct
    Wrong
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Answer : 4. "For the decomposition of Na2S AND NaCN formed"

Q:

Identify a conjugate pair in the equation:
NH3 + H2O ⇌ NH4+ + OH–.

633 0

  • 1
    Ammonia and water
    Correct
    Wrong
  • 2
    Water and hydroxide ion
    Correct
    Wrong
  • 3
    Ammonium ion and hydroxide ion.
    Correct
    Wrong
  • 4
    Ammonia and hydroxide ion
    Correct
    Wrong
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Answer : 2. "Water and hydroxide ion"

Q:

What is the full form of PVC?

628 0

  • 1
    Phosphonyl vinyl Carbonate
    Correct
    Wrong
  • 2
    Polyvinyl S Carbonate
    Correct
    Wrong
  • 3
    Polyvinyl Carbonate
    Correct
    Wrong
  • 4
    Polyvinyl Chloride
    Correct
    Wrong
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Answer : 4. "Polyvinyl Chloride"

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