Chemistry Questions Answers

• 29. The chemical used as a fixer in photography is ?

  1. sodium thiosulphate
  2. sodium sulphate
  3. borax
  4. ammonium sulphate

  Answer And Explanation

  Answer: Option A

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• 30. Water drops are spherical because of ?

  1. viscosity
  2. density
  3. polarity
  4. surface tension

  Answer And Explanation

  Answer: Option D

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• 31. Aspirin is

  1. acetyl salicylic acid
  2. sodium salicylate
  3. methyl salicylate
  4. ethyl salicylate

  Answer And Explanation

  Answer: Option A

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• 32. The oxide of Nitrogen used in medicine as anaesthetic is ?
  

  1. Nitrogen pentoxide
  2. Nitrous oxide
  3. Nitric oxide
  4. Nitrogen dioxide

  Answer And Explanation

  Answer: Option A

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• 33. Which one of the following metals does not react with water to produce Hydrogen?
  

  1. Cadmium
  2. Lithium
  3. Potassium
  4. Sodium

  Answer And Explanation

  Answer: Option A

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• 34. The most electronegative element among the following is
  

  1. sodium
  2. bromine
  3. fluorine
  4. oxygen

  Answer And Explanation

  Answer: Option C

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• 35. Atomic number is equal to

  1. Number of electrons
  2. Number of nutron
  3. Number of protons
  4. Total number of protons and neutrons

  Answer And Explanation

  Answer: Option C

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