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MCQs

Total Questions : 108 | Page 1 of 11 pages
Question 1. Which of the following character does not apply to water?
  1.    The water molecule is asymmetric
  2.    The water molecule readily forms hydrophobic interactions
  3.    The covalent bonds in water are highly polarized
  4.    All three atoms in the water molecule readily form hydrogen bonds
 Discuss Question
Answer: Option B. -> The water molecule readily forms hydrophobic interactions
Answer: (b).The water molecule readily forms hydrophobic interactions
Question 2. The main difference between an acid and a base is that
  1.    bases are polar molecules and acids are not
  2.    acids are polar molecules and bases are not
  3.    bases donate hydrogen ions in water while acids accept hydrogen ions
  4.    acids donate hydrogen ions in water while bases accept hydrogen ions
 Discuss Question
Answer: Option D. -> acids donate hydrogen ions in water while bases accept hydrogen ions
Answer: (d).acids donate hydrogen ions in water while bases accept hydrogen ions
Question 3. A solution with pH = 5 is __________ than a solution with pH = 7.
  1.    2 times more basic
  2.    10 times more basic
  3.    10 times more acidic
  4.    100 times more acidic
 Discuss Question
Answer: Option D. -> 100 times more acidic
Answer: (d).100 times more acidic
Question 4. The reason that fats contain more energy than simple sugars, is fats have many more
  1.    carbon atoms
  2.    hydrogen atoms
  3.    covalent bonds
  4.    hydrogen bonds
 Discuss Question
Answer: Option C. -> covalent bonds
Answer: (c).covalent bonds
Question 5. Weak acids generally have pKa
  1.    10^-14 Mvalues less than 1
  2.    10^14 MpKa values greater than 2
  3.    10^-7 Mbeen seldom found in living systems
  4.    10^7 Mthat cannot be used to buffer
 Discuss Question
Answer: Option C. -> 10^-7 Mbeen seldom found in living systems
Answer: 10^-14 MpKa values greater than 2
Question 6. The degree of ionization does not depend on?
  1.    Temperature
  2.    Current
  3.    Nature of solvent
  4.    Concentration
 Discuss Question
Answer: Option B. -> Current
Answer: (b).Current
Question 7. Aqueous solution of the detergents are _________
  1.    Neutral
  2.    Acidic
  3.    Basic
  4.    Amphoteric
 Discuss Question
Answer: Option C. -> Basic
Answer: (c).Basic
Question 8. K1 and K2 for oxalic acid are 6.5×10⁻² and 6.1×10⁻⁵ respectively. What will be the [OH⁻] in a 0.01M solution of sodium oxalate?
  1.    9.6×10⁻⁶
  2.    1.4×10⁻¹
  3.    1.2×10⁻⁶
  4.    1.3×10⁻⁸
 Discuss Question
Answer: Option C. -> 1.2×10⁻⁶
Answer: (c).1.2×10⁻⁶
Question 9. The hydrolysis constant of CH₃COONa is given by
  1.    Kh = Kw/Ka
  2.    Kh = Kw/Kb
  3.    Kh = Kw/Ka×Kb
  4.    Kh = Ka + Kb
 Discuss Question
Answer: Option A. -> Kh = Kw/Ka
Answer: (a).Kh = Kw/Ka
Question 10. If pKb for fluoride at 25°c is 10.83, the ionization constant of hydrofluoric acid in water at this temperature is?
  1.    3.52×10⁻³
  2.    6.75×10⁻⁴
  3.    5.38×10⁻²
  4.    1.74×10⁻⁵
 Discuss Question
Answer: Option B. -> 6.75×10⁻⁴
Answer: (b).6.75×10⁻⁴

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