Environmental Issues - Online Test
Q1. All are biofuels except
Answer : Option D
Explaination / Solution:
Biopetrol is fuel having characteristic similar to petrol but is produced from palmitic acid. So, it is not a biofuel. Biodiesel, marsh gas and ethanol are biofuels produced by action of microbes.
Q2. Mass destruction of aquatic life will be caused by:
Answer : Option D
Explaination / Solution:
Mass destruction of aquatic life will be caused by broad spectrum pesticides. Broad spectrum pesticides are effective against large number of pests whether useful or harmful. These pesticides reaches to water bodies along with rain water.
Q3. Using the same land for farming, forestry as well as animal husbandry will be called
Answer : Option A
Explaination / Solution:
Agroforestry is the using of same land for farming, forestry as well as animal husbandry in integrated manner. The byproduct of one process in used in another process.
Q4. Soil pollution :
i. can be of two types- positive and negative
ii. soil erosion is an example of positive soil pollution
i. can be of two types- positive and negative
ii. soil erosion is an example of positive soil pollution
Answer : Option D
Explaination / Solution:
Addition of harmful substances in soil is called soil pollution. Soil pollution is of two types positive and negative. Addition of organic wastes increase the productivity so positive. Soil erosion is the removal of top fertile layer of soil that reduce its fertility so it is a negative soil pollution.
Q5.
There are two types of ozone
i. Good ozone and bad ozone.
ii. Good ozone is present in stratosphere while bad ozone is present in troposphere.
Answer : Option A
Explaination / Solution:
There are two types of ozone, bad ozone and good ozone.
Bad ozone is present in troposphere, it is bad because it is a type of pollution. Ozone and other compounds in car exhaust form smog.
Good ozone is present in stratosphere, it is good because it protect us from harmful UV radiations from the Sun.
Q6. The biological amplification of DDT in the various trophic levels is known as
Answer : Option A
Explaination / Solution:
Biomagnification, also known as bioamplification or biological magnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of organisms at successively higher levels in a food chain.
The biological amplification of DDT in the various trophic levels is known as biomagnifications.
Q7. Spraying of DDT produces pollution of
Answer : Option C
Explaination / Solution:
Spraying of DDT produces pollution of air, water and soil. DDT is used as pesticides in agricultural field. It is non-biodegradable and reach to water bodies to pollute it. Some DDT also remains present in air as mist.
Q8. A gas produced by paddy fields and involved in global warming is
Answer : Option D
Explaination / Solution:
Anaerobic decomposition of plants in water produces methane gas in paddy field. This gas is involved in global warming as methane is a green house gas beside carbon dioxide.
Q9. Which one is most toxic
Answer : Option A
Explaination / Solution:
Out of the given gases carbon monoxide is the most toxic gas as it combine with hemoglobin present in blood and reduce the oxygen carrying capacity of blood.
Q10. DDT is a
Answer : Option C
Explaination / Solution:
DDT is a non-biodegradable pollutant used as pesticides in agricultural field. It pollutes the air, water and soil if used in form of spray.
