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Tenth Grade (Grade 10) Bonds and Mixing Questions

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Grade 10 Bonds and Mixing
A saturated solution of which of the following is least soluble at 20ºC?
Solubility Chart
  1. KI
  2. NaCl
  3. KCl
  4. KClO3
Grade 10 Bonds and Mixing
Which of the following represents an exothermic process?
  1. The breaking of bonds in HCl
  2. Melting of ice cubes
  3. The formation of bonds in KCl
  4. Sublimation of carbon dioxide ice
Grade 10 Bonds and Mixing
Which of the following represents a solution?
  1. sand and water
  2. CO (s)
  3. KF (aq)
  4. Xe (g)
Grade 10 Bonds and Mixing
Based on considerations of solubility, which of these solutions is insoluble?
  1. KCl (aq)
  2. LiF (aq)
  3. NaBr (aq)
  4. AgCl (aq)
Grade 10 Bonds and Mixing
Which combination(s) is/are most likely to form predominantly covalent bonds?
  1. Potassium-Chlorine
  2. Oxygen-Oxygen
  3. Hydrogen-Carbon
  4. More than one of the above
Grade 10 Bonds and Mixing
Methane is nonpolar, acetic acid is polar, and oxygen gas is nonpolar. Which statement correctly describes the behavior of these substances in water?
  1. Oxygen gas and methane don't dissolve in water, while acetic acid is soluble in water.
  2. Oxygen gas doesn't dissolve in water, while methane and acetic acid dissolve in water.
  3. Oxygen gas dissolve in water, while methane and oxygen gas don't.
  4. Oxygen gas, methane, and acetic acid are all insoluble in water.
Grade 10 Bonds and Mixing
Which statement correctly explains why hydrogen fluoride dissolves in water?
  1. Hydrogen fluoride is nonpolar and water is nonpolar.
  2. Hydrogen fluoride is polar and water is nonpolar.
  3. Hydrogen fluoride is nonpolar and water is polar.
  4. Hydrogen fluoride is polar and water is polar.
Grade 10 Bonds and Mixing

This question is a part of a group with common instructions. View group »

Based on the solubility curve shown below, how does the solubility of KI (s) change as the temperature decreases?
  1. The solubility decreases.
  2. The solubility increases.
  3. The solubility remains the same.
  4. The solubility increases and decreases.
Grade 10 Bonds and Mixing
Which of the following has the greatest entropy?
  1. CO (l)
  2. NO (g)
  3. CO (s)
  4. NO (s)
Grade 10 Bonds and Mixing
What is an example of a heterogeneous mixture?
  1. air
  2. salt water
  3. rbc's in plasma
  4. none of the above
Grade 10 Bonds and Mixing
Which of the following conditions is sufficient to increase the solubility of a solid in water?
Solubility Chart
  1. high pressure, only
  2. low temperature and low pressure
  3. low temperature and high pressure
  4. high temperature
Grade 10 Bonds and Mixing
How can a solution containing 125 g of KI dissolved in 100 g of water at 10ºC be classified?
Solubility Chart
  1. saturated
  2. unsaturated
  3. supersaturated
  4. none of the above
Grade 10 Bonds and Mixing
What is an example of a homogenous mixture?
  1. rbc's in plasma
  2. white gold
  3. salt water
  4. b and c
Grade 10 Bonds and Mixing
In aqueous solution of potassium fluoride, a potassium ion is attracted to which end of the water molecular?
  1. the hydrogen end, which is positive
  2. the hydrogen end, which is negative
  3. the oxygen end, which is neutral
  4. the oxygen end, which is negative
Grade 10 Bonds and Mixing
An example of a solvent is table salt (NaCl).
  1. True
  2. False
Grade 10 Bonds and Mixing
Which of the following situations represents an increase in entropy?
  1. A desk is cleaned up
  2. A room becomes messier over time
  3. Leaves on the ground are gathered into one pile
  4. Dirt is gathered into one pot
Grade 10 Bonds and Mixing
To dissolve is to                .
  1. spread out
  2. expand
  3. break apart
  4. shrink
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