Taste Test of Edible Substances Quiz

What is the chemical nature of curd, lemon juice, orange juice, and vinegar?

Why do substances like curd, lemon juice, orange juice, and vinegar taste sour?

What is the taste of baking soda?

What is the chemical nature of substances that are bitter in taste and feel soapy on touching?

What does the word 'acid' come from?

What is the purpose of using indicators in chemistry?

Which is the most commonly used natural indicator in the text?

What happens to litmus paper when added to an acidic solution?

Why should we not taste unknown substances according to the text?

What are substances that do not change the color of either red or blue litmus known as?

Acidity and Basicity

Curd, lemon juice, orange juice, and vinegar are acidic in nature due to the presence of acids such as lactic acid, citric acid, ascorbic acid, and acetic acid, respectively.
These substances taste sour because they contain acids that stimulate the sour taste buds on the tongue.

Bases

Baking soda has a bitter taste and feels soapy to the touch due to its basic nature.

Acidic and Basic Substances

Substances that are bitter in taste and feel soapy on touching are usually basic in nature.
The word 'acid' originates from the Latin word 'acidus,' meaning sour.

Indicators in Chemistry

Indicators are used in chemistry to determine whether a substance is acidic or basic.
Litmus is the most commonly used natural indicator, which turns red in acidic solutions and blue in basic solutions.
When litmus paper is added to an acidic solution, it turns red, and when added to a basic solution, it turns blue.

Safety Precautions

It is not recommended to taste unknown substances because they may be harmful or even toxic.

Neutral Substances

Substances that do not change the color of either red or blue litmus are known as neutral substances.

Test your knowledge of tastes of edible substances like lemon juice, orange juice, vinegar, curd, and tamarind with this quiz. Enter the taste of each substance as described in Table 4.1. Remember to exercise caution and not taste or touch anything unless asked to do so.