Practice the AP 9th Class Biology Bits with Answers Chapter 10 Soil Pollution on a regular basis so that you can attempt exams with utmost confidence.

AP State Syllabus 9th Class Biology Bits 10th Lesson Soil Pollution with Answers

I. Choose the correct answers :

Question 1.
Soil is made up of
A) minerals
B) decomposed organic matter
C) air and water
D) all
Answer:
D) all

Question 2.
The time required to create one inch of top soil
A) 100 – 1000 years
B) 100 – 10,000 years
C) 100 – 5000 years
D) 100 – 15,000 years
Answer:
B) 100 – 10,000 years

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 3.
The layer of the soil which is the foundation for the life on the earth
A) the middle layer
B) bottom layer
C) top layer
D) all the above
Answer:
C) top layer

Question 4.
Soil consists of nutrients required for plant growth are
A) nitrogen
B) phosphorus
C) potassium
D) all
Answer:
D) all

Question 5.
If the pH level of soil is below 7 then the soil is
A) acidic
B) alkaline
C) saline soil
D) organic soil
Answer:
A) acidic

Question 6.
The pH value of Alkaline soil is
A) above 7
B) below 7
C) above 8
D) below 8
Answer:
A) above 7

Question 7.
Major microbial groups in soil are
A) bacteria, fungi
B) bacteria, fungi, algae
C) bacteria, fungi, algae and protozoa
D) bacteria, fungi, protozoa
Answer:
D) bacteria, fungi, protozoa

Question 8.
The process of converting organic forms of elements to their inorganic forms by soil microorganisms is known as
A) biogeochemical cycles
B) mineralization
C) pyrolysis
D) incineration
Answer:
B) mineralization

Question 9.
A major part of the soil microbial biomass is composed of
A) algae
B) fungi
C) bacteria
D) protozoa
Answer:
B) fungi

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 10.
Waste substances that can be degraded by microbes into harmless and non-toxic substances are
A) degradable waste
B) non-biodegradable waste
C) biodegradable waste
D) non-degradable waste
Answer:
C) biodegradable waste

Question 11.
Excessive potassium content in soil decreases vitamin C and carotene content in
A) vegetables
B) fruits
C) grains
D) vegetables and fruits
Answer:
D) vegetables and fruits

Question 12.
The first widespread insecticide used is
A) DDT
B) BHC
C) Malathion
D) Nuvacron
Answer:
A) DDT

Question 13.
The process of increasing concentration of chemicals through the food chain is known as
A) incineration
B) pyrolysis
C) biomagnification
D) bioremediation
Answer:
C) biomagnification

Question 14.
Increase in solid waste is due to
A) increase in population
B) urbanization
C) both A and B
D) modernization
Answer:
C) both A and B

Question 15.
Hazardous solid waste includes
A) household waste
B) industrial waste
C) sanitation residue
D) construction waste
Answer:
B) industrial waste

Question 16.
An excellent binding material that keeps the soil intact and healthy
A) forests
B) grasslands
C) forests, grasslands
D) none
Answer:
C) forests, grasslands

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 17.
The amount of solid waste produced in Indian cities per day is
A) 50,000 – 80,000 metric tons
B) 5,000 – 8,000 metric tons
C) 500 – 800 metric tons
D) 600 – 800 metric tons
Answer:
A) 50,000 – 80,000 metric tons

Question 18.
Microbial decomposition of organic wastes generate large amounts of
A) ethane
B) propane
C) methane
D) acetylene
Answer:
C) methane

Question 19.
Which metal has unpleasant effect on human health ?
A) gold
B) silver
C) lead
D) copper
Answer:
C) lead

Question 20.
Soil pollution can be prevented by
A) limit construction in sensitive area
B) adopting four R’s : Reduce, Reuse, Recycle and Recover
C) applying biofertilizers and manures
D) all the above
Answer:
D) all the above

Question 21.
The average per capita solid wastes produced per day is
A) 264 gms
B) 364 gms
C) 634 gms
D) 346 gms
Answer:
B) 364 gms

Question 22.
This is the simple and most widely used technique of solid waste management.
A) burying the waste
B) burning the waste
C) incineration of waste
D) pyrolysis
Answer:
A) burying the waste

Question 23.
The solid waste management process which is expensive and cause air pollution
A) burying the waste
B) pyrolysis
C) incineration of waste
D) bioremediation
Answer:
C) incineration of waste

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 24.
Using a biological remedy to reduce or clean up contamination is known as
A) pyrolysis
B) incineration
C) bioaccumulation
D) bioremediation
Answer:
D) bioremediation

Question 25.
Volatile elements which can be released directly from plants to atmosphere are
A) lead, mercury
B) mercury, selenium
C) selenium, lead
D) antimony, mercury
Answer:
B) mercury, selenium

Question 26.
Land pollution occurs massively during
A) earthquakes, floods
B) land slides, hurricanes
C) earthquakes, floods, land slides
D) earthquakes, floods, land slides, hurricanes
Answer:
D) earthquakes, floods, land slides, hurricanes

Question 27.
This method helps in the percolation of water into the soil.
A) no – till farming
B) contour ploughing
C) crop rotation
D) planting trees
Answer:
B) contour ploughing

Question 28.
The uptake of nutrients in plants is also governed to a certain extent by
A) nature of the soil
B) soil pH
C) soil organisms
D) crop rotation
Answer:
B) soil pH

Question 29.
Number of earthworms present in one acre of land where the top soil is eight inches thick
A) 5000
B) 50000
C) 15000
D) 17000
Answer:
B) 50000

Question 30.
Step Farming is common in ………………..
A) Plains
B) Platues
C) Hills
D) Low lands
Answer:
C) Hills

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 31.
The microorganisms that help in the formation of soil …………………
A) Moss
B) Bacteria
C) Lichen
D) A and C
Answer:
D) A and C

Question 32.
Burning of fossil fuel adds ……………………..
A) H2, O2, N2 in air
B) CO2, NO2, SO2 gases in air
C) SO2, O2
D) SO3, SO2
Answer:
B) CO2, NO2, SO2 gases in air

Question 33.
Soil is the component of ………………
A) Atmosphere
B) Hydrosphere
C) Lithosphere
D) Biosphere
Answer:
C) Lithosphere

Question 34.
Soil that is best suited for plant growth is ………………
A) Clayey
B) Loamy
C) Sandy
D) Gravel
Answer:
B) Loamy

Question 35.
Biological weathering is caused by
A) Lichens
B) Mosses
C) Roots of plants
D) All the above
Answer:
D) All the above

Question 36.
Toxic chemicals released by paper industry are
A) Cadmium
B) Mercury
C) Lead
D) Nickel
Answer:
B) Mercury

Question 37.
Major sources of formation of soil is
A) Rocks
B) Himalayas
C) Riverbeds
D) Volcanoes
Answer:
A) Rocks

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 38.
Sun causes weathering of rocks through
A) Physical phenomena
B) Biological changes
C) Chemical changes
D) Mechanical force
Answer:
B) Biological changes

Question 39.
These are considered as wind breaks
A) Rows of trees and shrubs
B) Growing grasses alternating with crops
C) Compound walls
D) Raising edges of fields
Answer:
A) Rows of trees and shrubs

Question 40.
This gas is formed on burning of wood
A)NO2
B)O2
C) H2
D) CO2
Answer:
D) CO2

Question 41.
Ozone layer is present in this layer
A) Troposphere
B) Stratosphere
C) Ionosphere
D) None
Answer:
B) Stratosphere

Question 42.
“Friend of the farmer” ……………….
A) Frogs
B) Earthworms
C) Snails
D) Toads
Answer:
B) Earthworms

Question 43.
Biological remedy to clean up contamination is
A) Bio-remediation
B) Phyto remediation
C) Bio-magnification
D) Both A and B
Answer:
D) Both A and B

Question 44.
The hazardous elements that are released directly from plants to atmosphere
A) Selenium
B) Mercury
C) Lead
D) Both A and B
Answer:
D) Both A and B

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 45.
Identify the mismatched pairs from the following.
1) Reuse – Iron
2) Recycling – Paper
3) Contour ploughing – Soil Erosion
A) 1, 2
B) 2, 3
C) 1, 3
D) 1 only
A) 1, 2

Question 46.
Anaerobic/aerobic decomposition of biodegradable municipal and domestic wastes give
A) Natural gas
B) CNG
C) LPG
D) Gober gas
Answer:
D) Gober gas

Question 47.
These are considered as valuable sinks for CO2 ………………….
A) Fields
B) Rivers
C) Lakes
D) Forests
Answer:
D) Forests

Question 48.
Example for hazardous solid waste
A) Industrial and hospital waste
B) Debris
C) Chemical wastes
D) Discarded medicines
Answer:
A) Industrial and hospital waste

Question 49.
The best example for bio-magnification is …………………..
A) D.D.T
B) B.H.C
C) Dieldrin
D) All the above
Answer:
D) All the above

Question 50.
Identify the correct matching from the following.
List – A
1) Soil below pH7
2) Soil above pH7
3) Mycorrhiza

List – B
a) Symbiosis
b) Acidic
c) Basic
A) 1 – a, 2 – b, 3 – c
B) 1 – b, 2 – a, 3 – c
C) 1 – b, 2 – c, 3 – a
D) 1 – c, 2 – c, 3 – b
Answer:
C) 1 – b, 2 – c, 3 – a

Question 51.
Identify the mismatched pair from the following.
1) Biodegradable waste – Dung
2) Non-Biodegradable waste – Radioactive waste
3) D.D.T – Weedicide
A) 1, 2
B) 2, 3
C) 1, 3
D) 3 only
Answer:
D) 3 only

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 52.
Identify the correct matching from the following.
1) Biomagnification – Food chain
2) Solid wastes – Deforestation
3) Soil erosion – Burying the waste
A) 1, 3
B) 2 only
C) 1, 2
D) 1 only
Answer:
D) 1 only

Question 53.
Choose the correct matching from the following.
List – A
1) Incinaration
2) Bioremediation
3) Phytoremediation

List – B
a) Plants
b) Clean up contamination
c) Expensive method
A) 1 – a, 2 – b, 3 – c
B) 1 – c, 2 – b, 3 – a
C) 1 – a, 2 – c,3 – b
D) 1 – c, 2 – a,3 – b
Answer:
B) 1 – c, 2 – b, 3 – a

Question 54.
The range of pH values of a good soil lies from ………………..
A) 5.5 – 6.5
B) 6 – 7
C) 5.5 to 7.5
D) 5.5 – 8.5
Answer:
C) 5.5 to 7.5

Question 55.
D.D.T was not soluble in water but in …………….
A) Phenol
B) Fat
C) Carbohydrate
D) Benzene
Answer:
B) Fat

Question 56.
Expanded form of D.D.T is …………….
A) Di Dehydro Tetracycline
B) Diphenol Dihydro Tetrane
C) Dichloro Diphenyle Trichloro Ethane
D) Dichloro Diphenol Tri Ethane
Answer:
C) Dichloro Diphenyle Trichloro Ethane

Question 57.
The process of combustion in absence of oxygen is ……………………..
A) Incineration
B) Pyrolysis
C) Burning
D) Oxidation
Answer:
B) Pyrolysis

Question 58.
Calcium deficiency in soils is due to
A) High pH value
B) Low pH value
C) High Mg value
D) High humus value
Answer:
B) Low pH value

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 59.
Microbial activity and nutrient absorption in soils is due to
A) Low pH
B) High pH
C) High Humus
D) None
Answer:
B) High pH

II. Match the following:

i)

Group – A Group – B
1) Soil below pH 7 A) Symbiosis
2) Soil above pH 7 B) Weedicide
3) Mineralization C) Insecticide
4) Mycorrhiza D) Radioactive waste
5) Biodegradable waste E) Alkaline
6) Non-biodegradable waste F) Dung
7) DDT G) Soil microbes
H) Acidic

Answer:
1) Soil below pH 7 – H) Acidic
2) Soil above pH 7 – E) Alkaline
3) Mineralization – G) Soil microbes
4) Mycorrhiza – A) Symbiosis
5) Biodegradable waste – F) Dung
6) Non-biodegradable waste – D) Radioactive waste
7) DDT – C) Insecticide

ii)

Group – A Group – B
1) Biomagnification A) Methane
2) Soil erosion B) Expensive method
3) Solid wastes C) Clean up contamination
4) Incineration D) Food chain
5) Cow dung E) Burying the waste
6) Bioremediation F) Deforestation
7) Phytoremediation G) Animals
H) Plants

Answer:
1) Biomagnification – D) Food chain
2) Soil erosion – F) Deforestation
3) Solid wastes – E) Burying the waste
4) Incineration – B) Expensive method
5) Cow dung – A) Methane
6) Bioremediation – C) Clean up contamination
7) Phytoremediation – H) Plants

Question 60.
Which of the following does NOT cause soil pollution ?
A) Vegetable peels
B) Acid rain
C) Pesticides
D) Polythene bags
Answer:
A) Vegetable peels

AP 9th Class Biology Bits Chapter 10 Soil Pollution

Question 61.
One of the following statements is practicable keeping in view of waste management
A) Solid waste management involves collection, transfer and transport to suitable places.
B) We cannot treat industrial wastes.
C) Acidic and alkaline wastes should not be neutralised before disposal.
D) We should follow the Pyrolysis process as it requires more oxygen.
Answer:
A) Solid waste management involves collection, transfer and transport to suitable places.

Question 62.
BOD means
A) Basic Oxygen Demand
B) Biological Oxygen Demand
C) Biological Organic Demand
D) Biological Organic Density
Answer:
B) Biological Oxygen Demand