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pH of water is

  • 5
  • 6
  • 7
  • 8

Answer: Option C

Similar Questions :

1. Enzymes are

  • Fatty acids
  • Carbohydrates
  • Nucleic acids
  • Proteins

Answer: Option D

2. Which metal is heaviest ?

  • osmium
  • mercury
  • iron
  • nickle

Answer: Option A

3. The chemical used as a fixer in photography is ?

  • sodium thiosulphate
  • sodium sulphate
  • borax
  • ammonium sulphate

Answer: Option A

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

  • Na
  • Ag
  • Hg
  • Fe

Answer: Option D

5. Mass number of a nucleus is :

  • the sum of the number of protons and neutrons present in the nucleus
  • always more than the atomic weight
  • always less than its atomic number
  • None of above

Answer: Option A

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