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MCQs

Total Questions : 740 | Page 67 of 74 pages
Question 661. Growth of bacteria and fungi is sometimes inhibited by
  1.    sulfur dioxide
  2.    ammonium nitrate
  3.    sulfur trioxide
  4.    sulfur tetraoxide
 Discuss Question
Answer: Option A. -> sulfur dioxide
Answer: (a).sulfur dioxide
Question 662. The optimum pH value for action of sulfur dioxide (SO₂) resistance of microbe growth, is less than
  1.    3
  2.    4
  3.    2
  4.    1
 Discuss Question
Answer: Option B. -> 4
Answer: (b).4
Question 663. Oxides of group IV behave as
  1.    acid
  2.    base
  3.    amphoteric
  4.    alkalis
 Discuss Question
Answer: Option C. -> amphoteric
Answer: (c).amphoteric
Question 664. Sulfur dioxide (SO₂) is obtained on burning of
  1.    fossils fuel only
  2.    coal only
  3.    lime
  4.    fossils fuel and coal
 Discuss Question
Answer: Option D. -> fossils fuel and coal
Answer: (d).fossils fuel and coal
Question 665. Iron (Fe) metal in the form of steel (mixture of iron and carbon) can even be corroded by
  1.    acid rain
  2.    aerosols
  3.    rain
  4.    pollution
 Discuss Question
Answer: Option A. -> acid rain
Answer: (a).acid rain
Question 666. Down the group II, thermal decomposition gradually
  1.    increases
  2.    decreases
  3.    remains same
  4.    constant
 Discuss Question
Answer: Option A. -> increases
Answer: (a).increases
Question 667. On heating, lead(II) oxide (PbO) will produce
  1.    red lead oxide
  2.    Pb3O₄
  3.    triplumbic tetroxide
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 668. All tetrachlorides are hydrolyzed by water except
  1.    CCl₄
  2.    SiCl₄
  3.    SnCl₄
  4.    PbCl₄
 Discuss Question
Answer: Option A. -> CCl₄
Answer: (a).CCl₄
Question 669. Tetrachlorides (-Cl₄) are
  1.    volatile
  2.    simple covalent molecules
  3.    tetrahedral
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 670. The carbonates and nitrates of group II elements decompose upon
  1.    heating
  2.    mixing
  3.    reactions
  4.    none of above
 Discuss Question
Answer: Option A. -> heating
Answer: (a).heating

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