JANDKNCERT | Science | Class 7th |

Acids, Bases, and Salts | Science | Chapter 5 | Class 7th | Questions and Answers |

(I). Fill in the blank spaces by choosing the correct words from the list, given below:

Bitter, ants, corrosive, citric, soapy, slaked lime

1. The acid found in lemon is _________ acid.

2. The bases have __________ taste and _________ touch.

3. The sting of the _________ contains formic acid.

4. Sulphuric acid is highly ___________ acid.

5. Acidic soils are neutralized with ____________.

Ans.

1. The acid found in lemon is citric acid.

2. The bases have a bitter taste and soapytouch.

3. The sting of the ant contains formic acid.

4. Sulphuric acid is a highly corrosive acid.

5. Acidic soils are neutralized with slaked lime.

(II). The statements given below, are incorrect. Write the correct statements.

1. Sulphuric acid is an example of an organic acid.

Ans. Sulphuric acid is an example of mineral acid.

2. Blue litmus paper turns red in the basic solution.

Ans. Blue litmus paper turns red in acidic solution.

3. China rose solution turns green in citric acid solutions.

Ans. China rose solution turns green in basic solutions.

4. Formic acid is found in the sting of a grasshopper.

Ans. Formic acid is found in the sting of an ant.

5. During neutralization, an acid reacts with a salt to form water and a base, as products.

Ans. During neutralization, an acid reacts with a base to form, salt, and water, as products.