Lakshya Education MCQs

Question: Baking soda is chemically represented by
Answer: Option B

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Question 1. 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 2. The basic difference between vegetable oils and fats is in their
  1.    Density
  2.    Chemical properties
  3.    Physical state
  4.    Composition
Answer: Option C
Question 3. Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
  1.    V₂O₅ & Cr₂O₃
  2.    Oxides of nitrogen & Cr₂O₃
  3.    V₂O₅ on a porous carrier & oxides of nitrogen
  4.    Oxides of nitrogen & V₂O₅ on a porous carrier
Answer: Option D
Question 4. Washing soda is chemically represented by
  1.    Na₂CO₃
  2.    Na₂CO₃.H₂O
  3.    Na₂CO₃.10H₂O
  4.    NaHCO₃
Answer: Option C
Question 5. 99.5% purity oxygen is used in
  1.    Cutting and welding by oxy-acetylene flame
  2.    Hospitals for medicinal purposes
  3.    Gas masks and artificial breathing apparatus
  4.    All of the above
Answer: Option D
Question 6. 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

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