Environmental Science
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BS ZOOLOGY first semester Animal diversity ZOOL 101 - university of Punjab 2025
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Literary criticism
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this paper consists of 60 marks but now we have 35 marks paper.
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Can you please tell me more past papers please because my exams are starting from next week
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Did you provide the past papers of the science of society uos?
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Paper text
Time: 2:30 Hours
Write short answers of the following:
15 x2 = 30
ご
What are chemical fertilizers? Why are they needed for plant growth.
Differentiate between direct fertilizers and indirect fertilizers.
Why use of urea fertilizer for crops is generally preferred over ammonium nitrate fertilizer?
How Triple super phosphate (TSP) fertilizer is prepared?
Explain the role of Zine sulphate in plant growth.
vi)
Why complex fertilizers are preferred over single nutrient fertilizers?
vit)
What is the difference between biodegradeable and persistent pesticides?
viB)
Discuss acute toxicity and chronic toxicity.
ix)
Explain the term houschold agrochemicals?
Mention any two plant growth regulators and their functions?
xi)
How does industrial pollution effect soil quality?
Mention any four most important air pollutants?
Explain the sole of catalytic converter in automobiles to reduce air pollution?
xiv)
Discuss any one modern trend of waste management?
How detergents cause water pollution?
Subjective
empt Any Three Questions,
10×3 = 30
Explain briefly manufacture of Diammonium phosphate (DAP) and Ammonium nitrate (AN)
fertilizers with the help of flow sheet diagram?
Discuss the hazards associated with agrochemicals. Also explain their environmeatal aspects
Why is it necessary to control the weeds? Also discuss future trends of pest control.
Explain hriefly industrial waste control for the protection of environment.
