Chemistry Questions Practice Question and Answer

Q:

Which of the following is the strongest hydracid known?

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  • 1
    HCN
    Correct
    Wrong
  • 2
    Hclo4
    Correct
    Wrong
  • 3
    HCL
    Correct
    Wrong
  • 4
    Hno3
    Correct
    Wrong
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Answer : 2. "Hclo4"

Q:

The anode in a dry cell consists of 

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  • 1
    Cadmium
    Correct
    Wrong
  • 2
    Graphite
    Correct
    Wrong
  • 3
    Copper
    Correct
    Wrong
  • 4
    Zinc
    Correct
    Wrong
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Answer : 4. "Zinc "

Q:

In 1931, who recognised that an aromatic compound must have an odd number of pairs of electrons, which can mathematically be written as 4n+2 (n = 0,1,2,3 etc.)?

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  • 1
    Jacob Berzelius
    Correct
    Wrong
  • 2
    Erich Huckel
    Correct
    Wrong
  • 3
    Antoine Lavoisier
    Correct
    Wrong
  • 4
    Auguste Laurent
    Correct
    Wrong
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Answer : 2. "Erich Huckel"

Q:

If the pH value of a substance is lower than 7, it would be considered as–

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  • 1
    Neutral
    Correct
    Wrong
  • 2
    Base
    Correct
    Wrong
  • 3
    Acid
    Correct
    Wrong
  • 4
    Ion
    Correct
    Wrong
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Answer : 3. "Acid"

Q:

Atomic number of which of the following elements is greater than that of Copper?

1645 0

  • 1
    Zinc
    Correct
    Wrong
  • 2
    Manganese
    Correct
    Wrong
  • 3
    Iron
    Correct
    Wrong
  • 4
    Chromium
    Correct
    Wrong
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Answer : 1. "Zinc"

Q:

Find the temperature at which the below reaction will be in equilibrium if the enthalpy and entropy change for the reaction is 30 Kj mol-1 and 105 J K-1 mol-1 respectively
Br2(l) + Cl2(g) → 2BrCl(g)

1592 0

  • 1
    273 K
    Correct
    Wrong
  • 2
    300 K
    Correct
    Wrong
  • 3
    450 K
    Correct
    Wrong
  • 4
    285.7 K
    Correct
    Wrong
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Answer : 4. "285.7 K"

Q:

The helical structure of protein is stabilized by

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  • 1
    Depeptide bonds
    Correct
    Wrong
  • 2
    Hydrogen bonds
    Correct
    Wrong
  • 3
    Ester bonds
    Correct
    Wrong
  • 4
    Peptide bonds
    Correct
    Wrong
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Answer : 2. "Hydrogen bonds"

Q:

Which gas is known as 'noble gas' ? 

1563 0

  • 1
    Helium
    Correct
    Wrong
  • 2
    Carbon dioxides
    Correct
    Wrong
  • 3
    Hydrogen
    Correct
    Wrong
  • 4
    Oxygen
    Correct
    Wrong
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Answer : 1. "Helium "

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