Chemistry Questions Answers Online Quiz Test

• 1. Biogas majorly contains ?
  

  1. Ethane
  2. Methane
  3. Hydrogen
  4. CO

• 2. The nuclear particles which are assumed to hold the nucleons together are ?

  1. positrons
  2. neutrons
  3. electrons
  4. mesons

• 3. The metal that is used as a catalyst in the hydrogenation of oils is ?

  1. Pb
  2. Ni
  3. Cu
  4. Pt

• 4. The most abundant element in the earth's crust is ?

  1. Aluminium
  2. Nitrogen
  3. Silicon
  4. Oxygen

• 5. The most abundant rare gas in the atmosphere is ?

  1. He
  2. Ne
  3. Ar
  4. Xe

• 6. The ore which is found in abundance in India is

  1. monazite
  2. bauxite
  3. magnetite
  4. fluorspar

• 7. The luster of a metal is due to :

  1. high polishing
  2. high density
  3. chemical inertness
  4. presence of free electrons

• 8. The most malleable metal is

  1. platinum
  2. silver
  3. gold
  4. iron

• 9. Iodine can be separated from a mixture of Iodine and Potassium Chloride by ?
  

  1. Filtration
  2. Sublimation
  3. Distillation
  4. Sedimentation

• 10. The material which can be deformed permanently by heat and pressure is called a

  1. thermoset
  2. thermoplastic
  3. chemical compound
  4. polymer

• 11. Mass number of a nucleus is :

  1. the sum of the number of protons and neutrons present in the nucleus
  2. always more than the atomic weight
  3. always less than its atomic number
  4. None of above

• 12. 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

• 13. Due to rusting the weight of iron

  1. Decreases
  2. Increases
  3. Remains the same
  4. Uncertain

• 14. Which gas is used to manufacture vanaspati from vegetable oil is

  1. carbon dioxide
  2. nitrogen
  3. oxygen
  4. hydrogen

• 15. The most electropositive elements among the following is :

  1. Cs
  2. Ca
  3. Na
  4. Br

• 16. The Chemical Symbol of Sodium is

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

• 17. Which one is an organic Acid ?
  

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

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

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

• 19. Air is a

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

• 20. Chemical used in photography is

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