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MCQs

Total Questions : 212 | Page 5 of 22 pages
Question 41. Amphoteric oxides include
  1.    SO₂
  2.    ZnO
  3.    P₂O₅
  4.    P₄O₁₀
 Discuss Question
Answer: Option B. -> ZnO
Answer: (b).ZnO
Question 42. When an alkali is added to acid, water formation is also called as
  1.    polymerization
  2.    neutralization
  3.    formation of hydroxonium ions
  4.    reversible reactions
 Discuss Question
Answer: Option B. -> neutralization
Answer: (b).neutralization
Question 43. Acids are
  1.    corrosive
  2.    turn litmus from blue to red
  3.    sour in taste
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 44. Saccharin is
  1.    acidic
  2.    alkaline
  3.    neutral
  4.    salt solution
 Discuss Question
Answer: Option A. -> acidic
Answer: (a).acidic
Question 45. Metal oxides
  1.    are basic oxides
  2.    are soluble in water
  3.    are called alkalis
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 46. According to Lowry and Bronsted theory of acid and bases, water can act as
  1.    acid only
  2.    base only
  3.    ionic salt
  4.    acid and base
 Discuss Question
Answer: Option D. -> acid and base
Answer: (d).acid and base
Question 47. The sugar in our foods are converted to acid by the bacteria which can attack our tooth's
  1.    stability
  2.    enamel
  3.    color
  4.    roots
 Discuss Question
Answer: Option B. -> enamel
Answer: (b).enamel
Question 48. Acid ionizes and forms hydrogen ions when dissolved in
  1.    water
  2.    base
  3.    alcohol
  4.    alkali
 Discuss Question
Answer: Option A. -> water
Answer: (a).water
Question 49. A Bronsted-Lowry base is a
  1.    proton donor
  2.    proton acceptor
  3.    neutron donor
  4.    neutron acceptor
 Discuss Question
Answer: Option B. -> proton acceptor
Answer: (b).proton acceptor
Question 50. The acids which completely dissociate in a solution are called as
  1.    strong acids
  2.    weak acids
  3.    strong bases
  4.    weak bases
 Discuss Question
Answer: Option A. -> strong acids
Answer: (a).strong acids

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