The solution of MgO is _______-

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RRC Group D Previous Paper 57 (Held On: 29 Oct 2018 Shift 3)
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  1. Acidic
  2. Amphoteric
  3. Neutral
  4. Basic

Answer (Detailed Solution Below)

Option 4 : Basic
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Detailed Solution

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The correct answer is Basic.

Key Points

  • Magnesium oxide is a simple basic oxide because it contains oxide ions.
  • It reacts with water to form magnesium hydroxide which is a base.
  • Metal oxides on the left side of the periodic table produce basic solutions in water (e.g. Na2O and MgO).
  • Non-metal oxides on the right side of the periodic table produce acidic solutions (e.g. Cl2O, SO2, P4O10).
  • A basic solution is an aqueous solution containing more OH-ions than H+ions.
  • Examples of common basic solutions include soap or detergent dissolved in water or solutions of sodium hydroxide, potassium hydroxide, or sodium carbonate.

Additional Information

  • A solution with a pH less than 7 is considered acidic, and a solution with a pH greater than 7 is considered basic, or alkaline.
  • Strong acids have a higher concentration of hydrogen ions, and they are assigned values closer to 0.
  • An amphoteric solution is a substance that can chemically react as either acid or base. However, it is also possible for oxide to be neither acidic nor basic, but is a neutral oxide.
  • Examples of amphoteric substances include water, amino acids, proteins, and many metal oxides and hydroxides. Oxides and hydroxides of aluminium, antimony, arsenic, antimony, bismuth, beryllium, chromium, cobalt.
  • Neutral solutions are the solutions in which the concentration of hydrogen ions and hydroxide ions are equal Sodium chloride solution or a sugar solution is an example of a neutral solution.
  • A neutral solution has a pH equal to 7.
    • Water is another common substance that is neutral on the pH scale.
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