Chemistry Questions Answers MCQ - General Knowledge Set 08 - ObjectiveBooks

Chemistry Questions Answers MCQ - General Knowledge Set 08

G.K. Practice Test: Question Set - 08

1. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
    (A) Helium
    (B) Ozone
    (C) Oxygen
    (D) Methane

2. What are the number of moles of CO₂ which contains 16 g of oxygen?
    (A) 0.5 mole
    (B) 0.2 mole
    (C) 0.4 mole
    (D) 0.25 mole

3. The inexpensive and commonly used variety of glass is called soda glass. It is called so because
    (A) Was used initially for making bottles of soda(carbonated drink)
    (B) Is made using soda(sodium carbonate)
    (C) Was initially used for storing sodium carbonate
    (D) Is made using soda lime

4. The iron ore magnetite consists of
    (A) Fe2O3
    (B) Fe3OH4
    (C) FeCO3
    (D) 3Fe2O3 & 3H2O

5. The most important ore of aluminium is
    (A) Bauxite
    (B) Magnetite
    (C) Hematite
    (D) Monazite

6. The National Chemical Laboratory (INDIA) is situated in
    (A) New Delhi
    (B) Bangalore
    (C) Pune
    (D) Patna

7. The main active constituent of tea and coffee is
    (A) Nicotine
    (B) Chlorophyll
    (C) Caffeine
    (D) Aspirin

8. Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
    (A) 2 : 16 : 2
    (B) 2 : 16 : 1
    (C) 1 : 16 : 2
    (D) 1 : 1 : 1

9. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
    (A) p-electrons in Ne (Z = 10)
    (B) s-electrons in Mg (Z = 12)
    (C) d-electrons in Fe (Z = 26)
    (D) p-electrons in CI (Z = 17)

10. The inherited traits of an organism are controlled by
    (A) RNA molecules
    (B) Nucleotides
    (C) DNA molecules
    (D) Enzymes

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