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Acids, bases and salts - Important Questions & Preparation Tips

May 16, 2013 12:50 IST

    In this article you will get the clue that from where and how the questions are being framed from the chapter Acids, bases and salts. Our experts have full confidence that you will not lose any of the questions in the board exam as well as in home exams from this chapter if you will keep the following terms / question in your mind while studying.

    • How many elements are known to us?
    • What is an indicator? Name of commonly used indicators?
    • Use of blue litmus paper in acid and bases.
    • How can you say that orange juice is acidic in nature?
    • Explain the color changing in Methyl orange and phenolphthalein
    • What is universal indicator?
    • Why do we see a yellow stain on a white cloth?
    • What are olfactory indicators and their examples?
    • When will we not be able to detect the characteristics smell of onion and vanilla?
    • Why lemon has a sour taste?
    • Differentiate between organic and mineral acid?
    • Example of organic and mineral acids
    • In how many parts can acids be divided into?
    • What type of acid is vinegar and what are its uses?
    • Difference between concentrated and dilute acid
    • Why should we not add water to concentrated acid to form dilute acid?
    • What are the properties of acid?
    • Diagram to show the reaction of dilute sulphuric acid with zinc?
    • Why should you not keep sour stuff in metal utensils?
    • What is formed when:

                                 Acids react with metal carbonate
                                 Calcium hydroxide reacts with carbon dioxide

    • What will happen when excess of carbon dioxide is passed through lime water?
    • What is the solution if someone is suffering from acidity?
    • What are the different forms of calcium carbonate?
    • Does carbon dioxide support combustion?
    • What is formed when acid reacts with bases?
    • What is neutralization reaction?
    • What is formed when sodium hydroxide and hydrochloric acid reacts
    • What is formed when acid reacts with metal oxide?
    • What is the use of phenolphthalein solution?
    • What is milk of magnesia?
    • Why do acids have corrosive nature?
    • What do all acids have in common?
    • What is the common thing about all the acids?
    • What is the reason for acidic behavior of acids?
    • Why do glucose and alcohol do not show acidic character?
    • Explain the statement: through all acids contain hydrogen, but all the hydrogen containing compounds are not acidic?
    • Why do aqueous solutions of acid conduct electricity?
    • Why do acids do not show acidic behavior in the absence of water?
    • Differentiate between strong and weak acid?
    • Write word equation and then balanced equations for the reactions taking place when:
    • Dilute sulphuric acid reacts with zinc granules
    • Dilute hydrochloric acid reacts with magnesium ribbon
    • Dilute sulphuric acid reacts with aluminum powder
    • Dilute hydrochloric acid reacts with iron filings
    • What happens when acid reacts with base?
    • The common properties of all the bases
    • Neutralization reaction and its products
    • How do we know that non metal oxides are acidic in nature?
    • What are the uses of bases?
    • How do we determine the strength of acids and bases?
    • pH value of water
    • Universal indicator and its uses
    • Which is stronger acid- sulphuric acid or vinegar?
    • Importance of pH in ever day life
    • Antacids and their uses
    • When do tooth decay starts?
    • Does pH value effect plants and animals too?
    • How is soil treated when it is too acidic?
    • Acid rain its side effects.
    • How does honey bee protects itself?
    • What color will natural indicator show if you will add it to following substance?

                                 Potassium hydroxide, pH= 12
                                 Soda water, pH=5
                                 Sulphuric acid, pH=2

    • How are name of salt derived?
    • Characteristics of salt and properties of salts
    • What does hydrolysis of salt mean?
    • Neutral salt and its example?
    • How common salt obtained and what are its uses?
    • Name the chemicals obtained from common salt?
    • Production procedure caustic soda
    • Uses of:

                                  Sodium hydroxide
                                  Chlorine
                                  Hydrogen
                                  Hydrochloric acid

    • Properties of washing soda and Explain the production of washing soda with the help of equation.
    • What are the uses of sodium carbonate?
    • Chemical name of baking soda and its properties
    • State some uses of baking soda?
    • Why does cake become fluffy after adding baking soda?
    • How is sodium bicarbonate used as a fire extinguisher?
    • Bleaching agent and disinfectants
    • Bleaching powder, its properties and the uses
    • What is plaster of Paris and why is it called so?
    • Detail description, uses and properties of plaster of paris?
    • Why should plaster of paris be stored in moisture proof container?
    • What is water of crystallization?
    • Chemical formula of:

                                   Baking soda
                                   Washing soda
                                   Soda ash
                                   Sodium carbonate decahydrate

    • Chemicals that can be made of common salt
    • What will happen if we heat gypsum at 373K?

    There are some sample questios given below :

    1. Which of the following statements is not correct?
      1. All metal carbonates react with acid to give a salt, water and carbon dioxide
      2. All metal oxides react with water to give salt and acid
      3. Some metals react with acids to give salt and hydrogen
      4. Some non metal oxides react with water to form an acid
    2. Name the gas released when metals are allowed to react with dilute acids
      1. Co2
      2. H2
      3. O2
      4. N2
    3. Which of the following is not a mixed salt?
      1. K.Ca.PO4
      2. Ca(OCl)Cl
      3. Na.K.CO3
      4. KCl
    4. 10 ml of a solution of NaOH is found to be completely neutralized by 8 ml of a given solution of HCl. If we take 20 ml of the same solution of NaOH, the amount of HCL (the same solution as before) required to neutralize it will be
      1. 4ml
      2. 8ml
      3. 12ml
      4. 16ml
    5. What is the conjugate base of NH3?
      1. NH2
      2. NO2
      3. NO3
      4. NH4+
    6. Some naturally occurring indicators are
      1. Turmeric
      2. Litmus
      3. China rose
      4. All the above
    7. The ratio of the, wavelengths of a light wave travelling with a speed of 2 x 108 and 3 x 108 in different media is
      1. 2:3
      2. 4:7
      3. 5:3
      4. 7:4
    8. Which of the following phenomena occur, when a small amount of acid is added to water?
      1. Ionisation 
      2. Neutralisation
      3. Dilution 
      4. Salt formation
    9. Zinc reacts with an acid as well as with a base to liberate hydrogen. On the basis of this what should be the nature of the zinc metal?
      1. basic 
      2. acidic 
      3. amphoteric 
      4. neutral
    10. Which of the following hydroxide are alkali?
      1. Ammonium hydroixe
      2. Calcium hydroxide
      3. Copper hydroide
      4. Sodium hydroxide
    11. Which of the following compounds is used in soda-acid fire extinguishers?
      1. calcium hydroxide 
      2. calcium carbonate
      3. sodium hydrogen sulphate
      4. sodium hydrogen carbonate
    12. Which of the following is a general property of bases?
      1. taste sour
      2. turn litmus red
      3. conduct electric current in solution
      4. concentration of H3O+ is greater than concentration of OH−

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