Chemistry Questions Practice Question and Answer

Q:

Which of the following products are formed during anaerobic respiration in yeast?

235 0

  • 1
    Acetic acid + energy
    Correct
    Wrong
  • 2
    Lactic acid + carbon dioxide + energy
    Correct
    Wrong
  • 3
    Ethanol + carbon dioxide + energy
    Correct
    Wrong
  • 4
    Lactic acid + energy
    Correct
    Wrong
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Answer : 3. "Ethanol + carbon dioxide + energy"
Explanation :

1. Yeast breaks down glucose, producing ethanol and carbon dioxide and energy.

2. Yeast reacts anaerobically.

Q:

What do you call the type of drugs that mimic the natural messenger by switching on the receptor?

508 0

  • 1
    Antidepressants
    Correct
    Wrong
  • 2
    Depressants
    Correct
    Wrong
  • 3
    Agonist
    Correct
    Wrong
  • 4
    Antagonists
    Correct
    Wrong
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Answer : 3. "Agonist"

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.)?

355 0

  • 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:

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)

450 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:

Which of the following is the strongest hydracid known?

444 0

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

Q:

A strong acid has a ______________

446 0

  • 1
    Weak conjugate acid
    Correct
    Wrong
  • 2
    Weak conjugate base
    Correct
    Wrong
  • 3
    Strong conjugate base
    Correct
    Wrong
  • 4
    Strong conjugate acid
    Correct
    Wrong
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Answer : 2. "Weak conjugate base"

Q:

Read the following questions carefully and answer them. 

The isotope of Uranium used in atomic reactors is

393 0

  • 1
    $$U^235$$
    Correct
    Wrong
  • 2
    $$U^236$$
    Correct
    Wrong
  • 3
    $$U^237$$
    Correct
    Wrong
  • 4
    $$U^232$$
    Correct
    Wrong
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Answer : 1. "$$U^235$$ "

Q:

The helical structure of protein is stabilized by

428 0

  • 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"

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