Strength of Acids and Bases

IMPORTANT

Strength of Acids and Bases: Overview

This topic covers concepts, such as, pH Scale, Strength of Acid and Base Solutions, Role of pH for Self Defence of Animals and Plants & Universal Indicator etc.

Important Questions on Strength of Acids and Bases

MEDIUM
IMPORTANT

The pH values of certain familiar substances are given below.

              Substance             pH value
Lemon juice           2.2 - 2.4
Tomato juice                4.1
Coffee            4.4 - 5.5
Household ammonia               12.0

Analyse the data in the table and answer the following question:

Which substances are basic in nature?

MEDIUM
IMPORTANT

The pH values of certain familiar substances are given below.

              Substance             pH value
Lemon juice           2.2 - 2.4
Tomato juice                4.1
Coffee            4.4 - 5.5
Household ammonia               12.0

Analyse the data in the table and answer the following question:

Which substances are acidic in nature?

MEDIUM
IMPORTANT

The acid produced naturally in our stomach is: 

EASY
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Which acid enters into our body by a honey bee stung?

HARD
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Two solutions A and B when tested with universal indicator shows their pH values are 2 and 10 respectively. What are A and B?

EASY
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Antacids are _____ in nature. (acidic/ basic)

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Milk of magnesia is used for treatment of acidity of stomach because it is _____ in nature.

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Agricultural scientists have suggested to add a certain amount of lime powder to an agricultural field. What may be the reasons for this?

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As the pH value of a neutral solution increases, its

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A solution when treated with a universal indicator shows a pH value of 8. It is a

EASY
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What should be the pH of drinking water? (less than 6.8/ 6.8 to 8.5/ more than 8.5)

MEDIUM
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What happens when: Teeth are not cleaned after eating food at night. 

HARD
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What is pH? Describe the pH range of acidic and alkaline solutions.

 

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In pH, what P and H indicates? 

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Which acid is found in the sting of a red ant? 

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pH is the negative logarithm of which ions? 

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The average pH value of vinegar is:

HARD
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Calculate the H+ ion concentration of a solution having a pH of 3.

EASY
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The formula for pH can be written as:

EASY
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What does solution with pH 7 means?