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mnsoomro
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Organic farming is the technique of raising crops through uses of ______.
Manures Resistant varieties Bio fertilizers All of these Submitted by :- Muhammad Nawaz
Which elements is/are major elements for plant growth?.
Phosphorus Potasium Nitrogen All of these Submitted by :- Muhammad Nawaz
Which of the following is the substances which can be added to the soil to deliver necessary elements for growth?
Fertilizers Growth regulators Plant hormones Pesticides Submitted by :- Muhammad Nawaz
What is the percentage of nitrogen in ammonia?
82% 72% 46% 32% Submitted by :- Muhammad Nawaz
Ethanol can be converted into ethanoic acid by_________________?
A. Hydrogenation B. Oxidation C. Hydration D. Fermentation Submitted by :- Jamil Ahmed
The nitrogen present in some fertilizers helps plants.
to fight against diseases to produce protein to undergo photosynthesis to produce fat Submitted by :- Muhammad Nawaz
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?
A. oxidation B. elimination C. condensation polymerization D. additional polymerization Submitted by :- Jamil Ahmed
What is the percentage of nitrogen in urea?
46% 77% 88% 23% Submitted by :- Muhammad Nawaz
Heating phenol with Zn will yield_________________?
A. Benzene B. Benzoic acid C. Phenoxide D. Cyclohexane Submitted by :- Jamil Ahmed
Which is ideal for horticultural crops and for tobacco and potatoes.
Potassium Nitrate Potassium chloride Potassium sulphate None of these Submitted by :- Muhammad Nawaz