Chemistry Questions Answers

• 71. Which metal is heaviest ?

  1. osmium
  2. mercury
  3. iron
  4. nickle

  Answer :

  Option B

• 72. Who is regarded as father of modern chemistry ?

  1. Ruterford
  2. Einstein
  3. Lavoisier
  4. C.V. Raman

  Answer :

  Option C

• 73. The metal used to recover copper from a solution of copper sulphate is ?

  1. Na
  2. Ag
  3. Hg
  4. Fe

  Answer :

  Option D

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

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

  Answer :

  Option A

• 75. Natural rubber is a polymer derived from ?

  1. ethylene
  2. propylene
  3. isoprene
  4. butadiene

  Answer :

  Option C

• 76. What nucleus of atom contains ?

  1. protons
  2. electrons
  3. electrons and protons
  4. protons and neutrons

  Answer :

  Option D

• 77. Conduction band electrons have more mobility than holes because they are

  1. experience collision more frequently
  2. experience collision less frequently
  3. have negative charge
  4. need less energy to move them

  Answer :

  Option B