1. Which one of the following is a main component of fertilizers?
A. Chlorine
B. Hydrogen
C. Methane
D. Ammonia
ANSWER:D.Ammonia
SOLUTION : The main nitrogen-based straight fertilizer is ammonia (NH3) ammonium (NH4+) or its solutions, including: Ammonium nitrate (NH4NO3) with 34-35% nitrogen is also widely used.
2. Which fertilizer produce acidity in the soil?
A. Ammonium Sulfate
B. Sodium Nitrate
C. Magnesium Nitrate
D. All of the above
ANSWER:A.Ammonium Sulfate
SOLUTION:Ammonium-based fertilisers are the major contributors to soil acidification, especially if the nitrogen is leached rather than taken up by plants.
3. Which of the following crop is not used for green manuring?
A. Alfalfa
B. Cotton
C. Sesbania
D. None of the above
ANSWER : B.Cotton
SOLUTION: Cotton and rice are not commonly used for green manuring. Cotton is a cash crop grown for its fiber, while rice is not typically used for green manuring.
4. A balanced fertilizer for plant is ________.
A. Urea
B. Compost
C. Super Phosphate
D. Ammonium Sulphate
ANSWER: B.Compost
SOLUTION:Normally compost is considered as the balanced fertilizer as it does not harm plants and increase productivity.
5. The fertilizer which contain highest nitrogen content is __________.
A. Ammonium sulphate
B. Calcium Ammonium nitrate
C. Urea
D. Sodium nitrate
ANSWER: C.Urea
SOLUTION: Urea has the highest nitrogen content of all solid fertilizers at 46% N.
6. Sindri is known for the production of _________
A. Fertilizers
B. Milk
C. Oil Seeds
D. Power plants
ANSWER: A.Fertilizers
SOLUTION: Sindhri is an industrial township in Dhanbad in Jharkhand. Sindri is well known because of production of fertilizers.
7. Application of fertilizer during irrigation is known as _________
A. Emasculation
B. Sprinkler
C. Fertigation
D. Bioleaching
ANSWER: C.Fertigation
SOLUTION :
The application of fertilizer during irrigation is called fertigation. It’s also known as nutrigation.
8. Give an example of an inorganic fertilizer _________.
A. Cow dung
B. Vermi Compost
C. Urea
D. Compost
ANSWER: C.Urea
SOLUTION:Examples of inorganic fertilizers include: Urea: Urea is a common nitrogen fertilizer that is made from synthetic materials.
9. What are the two different types of molecules found in soap?
A. Acidic & Basic
B. Hydrophilic & Hydrophobic
C. Iconic and covalent
D. Organic & Inorganic
ANSWER:B.Hydrophilic & Hydrophobic
SOLUTION:The soap molecule has a Hydrophilic head and a hydrophobic tail. The molecules of soap are sodium or potassium salts of long-chain carboxylic acids.
10. What are the uses of gypsum?
A. Soil Sterilization
B. Pest Control
C. PH regulation
D. Improving soil Structure
ANSWER: C.82
SOLUTION:
Crude gypsum is used as a fluxing agent, fertilizer, filler in paper and textiles, and retarder in portland cement. About three-fourths of the total production is calcined for use as plaster of paris and as building materials in plaster, Keene’s cement, board products, and tiles and blocks.