A. 58
B. 68
C. 78
D. None of these
Correct Answer: 78 ✔
Last Updated: May 23, 2024
Related MCQs
- Nitrification takes place only in well aerated soils because the bacteria responsible for it are:
- The transfer of food energy from the source in plants through a series of organism with repeated stages of eating and being eaten is known as:
- Non-renewable environmental resources include various metals non-metalic minerals and
- Thick clouds of smoke containing soot and other particles coming out of the factories cause health problems for nearby people. Such as irritation of eyes and:
- Carbon monoxide is a poisonous gas, 1% of which in the air can kill a person in:
- Acid rain brings with it:
- Certain cities of Pakistan have been subjected to tremendous air pollution due to increased:
- Of the total body weight of the organism, water constitutes about:
- The amount of fresh water on our planet is:
- Of the total fresh water, 10% is used in homes whereas 90% is used in:
- The depleted soils can be enriched by the addition of:
- The land may be abused by:
- Misuse of land involves:
- Pollution of soil may destroy its structure and:
- The natural nitrogen cycle is greatly affected by the excessive use of:
- A chemical, which kills the weeds, is known as:
- All the non-cultivated plants and non-comesticated animals are referred to as:
- The precious skins of beavers, muskrats, seals, minks and foxes etc, are used as luxury furs and in:
- About 95% of the energy requirements in Pakistan are met with by the:
- The atomic energy is derived by splitting the nuclei of a:
- The primary nuclear fuel used in the atom today is:
- Exposure of human beings to high energy from nuclear power plants can cause:
- Hydroelectric power is the electric power generated by the energy of:
- In Pakistan Tarbela, Mangla and Warsak dams are the main:
- In USA, electricity is also being generated with the half geothermal power plants in which is used water:
- As a source of power generation, windmills are still in use in some European countries, especially:
- Methane gas is produced during the scientific process of:
- The temperature of surface water of oceans is about 25C and it is 5?C at the depth of few hundred meters in the:
- People taking food adequate in calories but deficient in protein may suffer from:
- Dams and canal networks developed for irrigation purposes in Pakistan and may other countries create the problem of:
- The annual population growth rate of some countries like Great Britain, Sweden, Norway, Hungary and Japan is: