Lakshya Education MCQs

Question: 99.5% purity oxygen is used in
Options:
A.Cutting and welding by oxy-acetylene flame
B.Hospitals for medicinal purposes
C.Gas masks and artificial breathing apparatus
D.All of the above
Answer: Option D

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More Questions on This Topic :

Question 1. Washing soda is chemically represented by
  1.    Na₂CO₃
  2.    Na₂CO₃.H₂O
  3.    Na₂CO₃.10H₂O
  4.    NaHCO₃
Answer: Option C
Question 2. Baking soda is chemically represented by
  1.    Na₂CO₃
  2.    NaHCO₃
  3.    Na₂CO₃.H₂O
  4.    Na₂CO₃.10H₂O
Answer: Option B
Question 3. Pick out the wrong statement.
  1.    Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively
  2.    Protein catalysts are called enzymes
  3.    The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes
  4.    Total sugar content in molasses is about 10%
Answer: Option D
Question 4. In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because
  1.    SO₃ gas is sparingly soluble in water
  2.    Water forms an acid mist, which is difficult to absorb
  3.    The purity of acid is affected
  4.    Scale formation in the absorber is to be avoided
Answer: Option B
Question 5. The catalyst used in the production of elemental sulphur from H₂S (by oxidation-reduction) is
  1.    Alumina
  2.    Silica gel
  3.    Platinum
  4.    Nickel
Answer: Option A
Question 6. 10% oleum comprises of 10% free
  1.    SO₂
  2.    H₂SO₃
  3.    SO₃
  4.    H₂SO₄
Answer: Option C

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