Objective Question s Practice 1

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  1. Which of the following substances sublimes at room pressure when heated?
    1. Iodine
    2. Dry ice (Solid carbon dioxide)
    3. Naphthalene
    4. Ammonium Chloride
  2. Which of the following take place when water solidifies to become ice?
    1. Energy is absorbed from the surrounding.
    2. Water molecules get nearer to each other.
    3. Water molecules are not arranged orderly.
    4. The mass increase.