12 Class Fsc Part 2 Short Questions Online Preparation for Chemistry chapter wise

Online Short Questions For Chapter 2 "12th Class Chemistry Chapter 2 Short Questions Preparation "

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Chemistry - 12th Class Chemistry Chapter 2 Short Questions Preparation

Question # 1

Write the formulae of 1) Natron 2) Dolomite.

  • Ans 1: Formulae of 1)Natron 2) Dolomite
    Formula of Natron: Na2CO3.H2O
    Formula of Dolomite: MGCO3.CaCO3
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Prepare Complete Set Wise Questions For Chapter 2 "12th Class Chemistry Chapter 2 Short Questions Preparation "

12th Class Chemistry Chapter 2 Short Questions Preparation - Set 1

Question # 1

Write the formulae of 1) Natron 2) Dolomite.

  • Ans 1: Formulae of 1)Natron 2) Dolomite
    Formula of Natron: Na2CO3.H2O
    Formula of Dolomite: MGCO3.CaCO3
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12th Class Chemistry Chapter 2 Short Questions Preparation - Set 2

Question # 1

Why lithium carbonate decomposes on heating while other alkali metal carbonates remain unaffected?

  • Ans 1: Lithium has low electropositive character,thus its carbonate and nitrate are not so stable and therefore decompose giving lithium oxide.Carbonates of other alkali metals do not decompose.
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12th Class Chemistry Chapter 2 Short Questions Preparation - Set 3

Question # 1

Why lime is added to acidic soil?

  • Ans 1: Addition of lime to acidic soil:Large quantities of calcium oxide are used in agriculture for neutralizing acidic soils.It has been found that application of lime to acidic soils increases the amount of readily soluble phosphorus.
    Calcium oxide is also used in large amounts for making lime-sulphur sprays which have as strong fungicidal action.The hydroxide of calcium is obtained when the oxide of the calcium is allowed to react with water.The process is called slaking of lime and it is an exothermic reaction.
    CaO+H2O------->Ca(OH)2
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12th Class Chemistry Chapter 2 Short Questions Preparation - Set 4

Question # 1

What is mil;k of Magnesia and for which treatment it used.

  • Ans 1: A suspension of Mg(OH)2in water is called milk of magnesia and it is used for the treatment of acidity in stomach.
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12th Class Chemistry Chapter 2 Preparation

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