CBSE (Central Board of Secondary Education) Class-8 Science: Questions 23 - 28 of 465
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Question 23
Question MCQ▾
Fixation of Nitrogen is:
Choices
Choice (4) | Response | |
---|---|---|
a. | The process of conversion of free nitrogen into compounds of nitrogen. | |
b. | Release of ammonia after death or decay of plant bodies. | |
c. | Free nitrogen present in the atmosphere. | |
d. | Conversion of nitrogen into amino acids and proteins by the plants |
Question 24
Question MCQ▾
Bacterial diseases in plants are:
Choices
Choice (4) | Response | |
---|---|---|
a. | loose smut of wheat, potato blight | |
b. | Leaf spot of cotton | |
c. | Citrus canker , potato scab | |
d. | Both b. and c. are correct |
Question 25
Question MCQ▾
What is Boadcasting
Choices
Choice (4) | Response | |
---|---|---|
a. | Process of breaking up of the soil | |
b. | process of sowing seeds by hand | |
c. | Process of loosening and turning of soil | |
d. | Process of removing weeds |
Question 26
Question MCQ▾
Method of storing and packing of food is
Choices
Choice (4) | Response | |
---|---|---|
a. | Canning | |
b. | Irradiation | |
c. | UHT | |
d. | Drying |
Question 27
Question MCQ▾
Name the festival related to harvesting season in Tamil Nadu
Choices
Choice (4) | Response | |
---|---|---|
a. | Pongal | |
b. | Baisakhi | |
c. | Bihu | |
d. | Onam |
Question 28
Question MCQ▾
What is lodging?
Choices
Choice (4) | Response | |
---|---|---|
a. | Fast and strong winds accompanied by rains result in fall of mature crops | |
b. | Scarcity of water for the crops | |
c. | Increase in the amount of salts in the soil | |
d. | Excessive supply of water to the crop |