The Halogens

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1. What solution is added to a halide solution to detect the presence of halide ions?

  • Aqueous Solution of Hydrochloric Acid (HCl).
  • Aqueous solution of Silver Nitrate (AgNO3).
  • Cyclohexane (C6H12).
  • Nitric Acid (HNO3).
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2. What is the typical charge of an ionic halide?

  • 1-
  • 1+
  • 2-
  • 2+

3. What 3 points explain the trend in reactivity down the group?

  • Atomic radius increases; Electron shielding increases; Ability to gain an electron into the p sub-shell decreases to form a halide ion.
  • Atomic radius decreases; Electron shielding increases; Ability to gain an electron into the p sub-shell increases to form a halide ion.
  • Atomic radius increases; Electron shielding decreases; Ability to gain an electron into the p sub-shell decreases to form a halide ion.
  • Atomic radius decreases; Electron shielding decreases; Ability to gain an electron into the p sub-shell increases to form a halide ion.

4. What are the strucural properties of a Group 7 element?

  • Metallic, Strong van der Waals' forces between diatomic molecules.
  • Simple molecular; Weak van der Waals' forces between diatomic molecules.
  • Giant ionic, Strong van der Waals' forces between diatomic molecules.
  • Giant covalent; Weak van der Waals' forces between diatomic molecules.

5. Which statement is true?

  • The Halogens have low melting and boiling points which increase down the group.
  • The Halogens have high melting and boiling points which increase down the group.
  • The Halogens have high melting and boiling points which decrease down the group
  • The Halogens have low melting and boiling points which decrease down the group.

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