Which is a nitrogenous fertilizer?
- Calcium ammonium nitrate
- Ammonia sulfate
- Urea
- All above
Submitted by :- Muhammad Nawaz
CHEMISTRY
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When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
A. 2 moles of ethane
B. 1 mole of ethane
C. 2 moles of butane
D. 1 mole of butane
Submitted by :- Jamil Ahmed
Which is the most effective pesticide?
- Organophosphates
- Carbamates
- Organochlorines
- All of these
Submitted by :- Muhammad Nawaz
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
A. CH3-X
B. (CH3)3 C-CH2 – X
C. (CH3)2 CH – X
D. (CH3)3 C – X
Submitted by :- Jamil Ahmed
Which of the following is green manure/ bio fertilizer?
- Oat
- Rice
- Sesbania
- Maize
Submitted by :- Muhammad Nawaz
Which one is not a nucleophile ?
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