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Solutions (Grades 11-12)

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Solutions

1. 
In which of the solvents below would hydrogen chloride dissociate nearly to completion?
  1. Water
  2. Glacial acetic acid
  3. Ethylene diamine
  4. Aniline
 
2. 
Which of the following non-aqueous solvents is amphiprotic?
  1. Benzene
  2. Chloroform
  3. Pyridine
  4. Methanol
3. 
In which of the following solvents is the acidic property of the solute enhanced?
  1. Ammonia
  2. Water
  3. Methanol
  4. Formic acid
 
4. 
A                              solution is a mixture of two or more pure and chemically non-reactive substances, whose composition can be varied within certain limits.
5. 
Which of the following solvents is aprotic?
  1. Water
  2. Methanol
  3. Ethanol
  4. Chloroform
 
6. 
Which of the following units is associated with solubility?
  1. g solvent
  2. g solute
  3. g solute/100 g of water
  4. mol/L
7. 
Which of the following descriptions correctly defines the dielectric constant?
  1. How well a solute can store electrical charge, in comparison to how well water can store electrical charge
  2. How well a solute can store electrical charge relative to the ability of free space to store electrical charge
  3. How well two electrons can retain their electrical charge
  4. Both (a) and (c)
 
8. 
For the following reaction:

HA [math]hArr[/math] [math]H^+ + A^-[/math]

Which of the following represents a correct general equation for the acid dissociation constant?
  1. [math]K_a = [H^+]/[HA][/math]
  2. [math]K_a = [A^-]/[HA][/math]
  3. [math]K_a = [H^+][/math]
  4. [math]K_a = {[H^+][A^-]}/{[HA]}[/math]
9. 
When an ionic compound dissolves, it exists in a solution as               .
 
10. 
All organic solvents, including methanol, can dissolve methane.
  1. True
  2. False
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