Chemistry Questions Answers

• 64. Which is used in preparation of dynamite ?

  1. glycerol
  2. ethyl alcohol
  3. methyl alcohol
  4. glycol

  Answer :

  Option A

• 65. Aspirin is

  1. AE
  2. AB
  3. CB
  4. FB
  5. acetyl salicylic acid
  6. sodium salicylate
  7. methyl salicylate
  8. ethyl salicylate

  Answer :

  Option E

• 66. Who proposed first atomic theory ?

  1. E.Rutherford
  2. De Broglie
  3. John Dalton
  4. D.I.Mendeleef

  Answer :

  Option C

• 67. Which gas is used in fire extinguishers ?
  

  1. Carbon dioxide
  2. Nitrogen oxide
  3. Carbon monoxide
  4. Sulpher dioxide

  Answer :

  Option A

• 68. What is laughing gas ?
  

  1. nitrous oxide
  2. nitric oxide
  3. nitrogen oxide
  4. nitrogen peroxide

  Answer :

  Option A

• 69. Why is phosphorus kept under water ?

  1. to make it wet
  2. to make it durable
  3. water forms a protective coating on it
  4. to save it from catching fire when exposed to dry air

  Answer :

  Option D

• 70. pH of blood is ?

  1. 10.4
  2. 9
  3. 7.4
  4. 4

  Answer :

  Option C