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Tenth Grade (Grade 10) Bonds and Mixing Questions

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Grade 10 Bonds and Mixing
Which must be a mixture of substances?
  1. liquid
  2. solution
  3. solid
  4. gas
Grade 10 Bonds and Mixing
Which of the following statements correctly describes how the bond polarity of NaCl compares to that of H2S?
  1. It has a weaker bond polarity.
  2. It has a stronger bond polarity.
  3. They have equal bond polarities.
  4. There is not enough information to answer this question.
Grade 10 Bonds and Mixing
Long bond length is very strong.
  1. True
  2. False
Grade 10 Bonds and Mixing
To separate solids in suspensions what would you use?
  1. chromatography
  2. filtration
  3. centrifugation
  4. distillation
Grade 10 Bonds and Mixing
We know that air is a mixture and not a compound because
  1. it can be heated to a higher temperature.
  2. it can be compressed to a smaller volume.
  3. it is colorless.
  4. its composition can vary.
Grade 10 Bonds and Mixing
What occurs when HBr breaks down to form an H atom and a Br atom?
  1. Energy is absorbed.
  2. Energy is released.
  3. Energy is created.
  4. Matter is destroyed.
Grade 10 Bonds and Mixing
A student makes an aqueous solution of sodium hydroxide. Which statement correctly identifies the two ions present in the solute of this mixture?
  1. The sodium ion is negative, and the hydroxide ion is positive.
  2. The sodium ion is positive, and the hydroxide ion is negative.
  3. The sodium ion is positive, and the hydroxide ion is positive.
  4. The sodium ion is negative, and the hydroxide ion is negative.
Grade 10 Bonds and Mixing

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

Which of the following conditions is sufficient to increase the solubility of a solid in water?
  1. high pressure, only
  2. low temperature and low pressure
  3. low temperature and high pressure
  4. high temperature
Grade 10 Bonds and Mixing
Which of the pairs of elements listed will NOT form an ionic solid?
  1. barium and iodine
  2. lithium and chlorine
  3. calcium and oxygen
  4. oxygen and hydrogen
Grade 10 Bonds and Mixing
What happens as the atoms in a molecule of fluorine come closer together?
  1. The forces of attraction between the atoms become weaker, while the forces of repulsion between the atoms become stronger.
  2. The forces of repulsion between the atoms become weaker, while the forces of attraction between the atoms become stronger.
  3. The forces of repulsion and the forces of attraction become stronger.
  4. The forces of repulsion balance out the forces of attraction.
Grade 10 Bonds and Mixing
What happens to the stability of a system as a bond breaks apart?
  1. The system becomes more stable.
  2. The system becomes less stable.
  3. The stability depends on the bond involved.
  4. The stability is not affected by the formation or breaking of a bond.
Grade 10 Bonds and Mixing
A person's hand heats up when his hand is placed on a solution of lithium bromide, as the lithium bromide is dissolved in water. Which statement correctly describes this process?
  1. The dissolving of lithium bromide is an endothermic process, and heat is absorbed.
  2. The dissolving of lithium bromide is an exothermic process, and heat is released.
  3. The dissolving of lithium bromide is a chemical change.
  4. The dissolving of lithium bromide is an endothermic process, and heat is released.
Grade 10 Bonds and Mixing
When Ag(I) forms an ion, what charge does it have?
  1. +1
  2. +2
  3. -1
  4. 0
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