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Free TEAS Test Exam Braindumps (page: 52)

Page 52 of 124
PDF with 492 Questions

Which of these patterns of the periodic table is not correct?

  1. In metallic groups, reactivity increases down a group.
  2. Atomic size increases down a group and across a period (from left to right).
  3. In non-metallic groups, reactivity decreases down a group.
  4. Densities and melting points increase down any group.

Answer(s): B



Simple covalent compounds show which of the following properties?

  1. They are soluble in organic solvents e.g. ethanol.
  2. They conduct electricity when molten or dissolved in water.
  3. They are crystalline solids at room temperature.
  4. They have high melting and boiling points.

Answer(s): A



The law of conservation of mass states that ____________.

  1. The total mass of all products of a chemical reaction is independent of the total mass of all the reactants. They are not related.
  2. The total mass of all products of a chemical reaction is equal to the total mass of all the reactants.
  3. The total mass of all products of a chemical reaction is more than the total mass of all the reactants.
  4. The total mass of all products of a chemical reaction is less than the total mass of all the reactants, because some mass coverts to energy during reaction.

Answer(s): B



What happens when a piece of zinc is placed in a copper(II) sulphate solution?

  1. Zinc displaces copper from copper(II) sulphate solution. The original blue color of the solution persists.
  2. Sulphur dioxide is liberated.
  3. Zinc displaces copper from copper(II) sulphate solution.
  4. No reaction occurs because zinc is less reactive metal than copper.

Answer(s): C



Page 52 of 124



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Juana commented on November 15, 2024
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