Acids, Bases and Salts in Soil

Q. What shall be the optimal pH range of a soil so that it is suitable for plant growth?

1. 2.0 to 3.0
2. 8.0 to 10.0
3. 5.5 to 7.0
4. Above 10

Q.

Is acid more dangerous than base?

Q.

A sample of soil is collected from a garden. When this sample is mixed with the red cabbage extract, the color of the extract changes to light pink. Which of the following should be added to make the soil suitable for plant growth?

1. Quicklime

2. Lemon extract

3. Vinegar

4. Slaked lime

Q. Under alkaline conditions of the soil in farmlands, farmers treat the soil with quick lime, slaked lime or calcium carbonate.

1. True
2. False

Q.

A farmer while cultivating his farm by mistake added a lot of pesticides with a pH 2 into the soil. What will be the effect on his crops?

1. Doesn't affect the crops.

2. Crops produce more vegetables.

3. Crops are destroyed.

4. Crops grow faster.

Q.

Which of the following is most suitable for the growth of plants?

1. Neutral soil

2. Acidic soil

3. Basic soil

4. Can’t be said

Q.

Organic matter is usually added to soil. Why?

1. increase the alkalinity of the soil.

2. increase the acidity of the soil.

3. decrease the alkalinity of the soil.

4. decrease the acidity of the soil.

Q.

A sample of soil is collected from a garden. When this sample is mixed with the extract of red cabbage, the color of the extract changed to light pink. Which of the following(s) should be added to make the soil suitable for plants?

1. Quicklime

2. Lemon extract

3. Vinegar

4. Slaked lime

Q.

Some crops are suitable for growing in soil with acidic nature. Which salt can be added, in order to increase the acidic nature of the soil?

1. Sodium hydroxide

2. Milk of Magnesia

3. Slaked lime

4. Ammonium sulphate