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Question-1
In which year was the Yamuna action plan launched?
(A)
1992
(B)
1990
(C)
1983
(D)
1993
Question-2
The excess growth of algae in a water body is known as:
(A)
Eutrophication
(B)
Algal bloom
(C)
Sludge
(D)
Sewage
Question-3
Which of the following effluents from sewage treatment plants contribute to eutrophication along with nitrogen fertilizers?
(A)
Phosphorus
(B)
Zinc
(C)
Phosphate
(D)
Magnesium
Question-4
Open rain water drains provide an ideal breeding ground for:
(A)
Earthworms
(B)
Housefly
(C)
Mosquitoes
(D)
Bugs
Question-5
The Chernobyl nuclear power plant was located in:
(A)
Ukraine
(B)
Uganda
(C)
Uruguay
(D)
Guyana
Question-6
The tank used for the treatment of waste water with aerobic bacteria is called:
(A)
Aerobic tank
(B)
Aeration tank
(C)
Stirring tank
(D)
Anaerobic tank
Question-7
The amount of oxygen required by microorganisms to decompose the organic substance is known as:
(A)
Dissolved Oxygen
(B)
Chemical oxygen demand
(C)
Biochemical oxygen demand
(D)
Turbidity
Question-8
Waste water from school, office and home are generally called:
(A)
Industrial waste
(B)
Municipal waste
(C)
Agricultural waste
(D)
Domestic waste
Question-9
The solid part that settles at the bottom of the primary treatment plant is called:
(A)
Primary sludge
(B)
Primary waste
(C)
Primary product
(D)
All the above
Question-10
In vermi processing toilet, the human excreta is treated with:
(A)
Earthworms
(B)
Maggots
(C)
Bugs
(D)
Mosquitoes
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Std 7
CBSE
Practice in Related Chapters
Nutrition in Plants
Nutrition in Animals
Transportation in Animals and Plants
Respiration
Soil
Weather, Climate and Adaptations of Animals to Climate
Water- A Precious Resource
Forests: Our Lifeline
Transportation and Excretion
Natural Resources-Forest Products
Waste Management
Reproduction in plants
Waste water Management
Forest and Their Conservation
Movements of Substances
The Living World and its Surroundings
Multiplication in Plants
Living Science
Introduction to Cells
Cell Organelles
Levels of Organisation
Organ Systems of Human Body
Life Processes: Nutrition in Animals and Plants
Life Processes-Movement in Plants and Animals
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