Chemistry Questions Answers

• 57. The Chemical Symbol of Sodium is

  1. So
  2. Sd
  3. Na
  4. Nu

  Answer And Explanation

  Answer: Option C

  Explanation:

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• 58. Which one is an organic Acid ?
  

  1. Sulphuric
  2. Citric
  3. Nitric
  4. Phosphoric

  Answer And Explanation

  Answer: Option B

  Explanation:

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• 59. The gas used for artificial ripening of green fruit is ?

  1. ethane
  2. ethylene
  3. carbon dioxide
  4. acetylene

  Answer And Explanation

  Answer: Option B

  Explanation:

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• 60. Air is a

  1. compound
  2. colloid
  3. element
  4. mixture

  Answer And Explanation

  Answer: Option D

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• 61. Chemical used in photography is

  1. sodium sulphate
  2. sodium sulphite
  3. sodium thiosulphate
  4. sodium oxalate

  Answer And Explanation

  Answer: Option C

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• 62. A catalyst is a substance which
  

  1. increases the activation energy
  2. increases the rate of reaction and increases the equilibrium concentration of products
  3. changes the equilibrium of a reaction so that the concentration of the product increases
  4. hastens the attainment of equilibrium

  Answer And Explanation

  Answer: Option D

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• 63. The high reactivity of fluorine is due to ?

  1. small size of fluorine atom
  2. its high electro negativity
  3. availability of d-orbitals
  4. strong F - F bond

  Answer And Explanation

  Answer: Option B

  Explanation:

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