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Question-1
The Chernobyl nuclear power plant was located in:
(A)
Ukraine
(B)
Uganda
(C)
Uruguay
(D)
Guyana
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
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-4
Open rainwater drains may spread infectious diseases like:
(A)
Malaria
(B)
Dengue
(C)
Influenza
(D)
Cold
Question-5
The waste water from kitchens and bathrooms is often called:
(A)
Grey water
(B)
White water
(C)
Red water
(D)
Blue water
Question-6
In which sea is rapid eutrophication seen?
(A)
Red sea
(B)
Mediterranean sea
(C)
Arabian sea
(D)
All the above
Question-7
Open rain water drains provide an ideal breeding ground for:
(A)
Earthworms
(B)
Housefly
(C)
Mosquitoes
(D)
Bugs
Question-8
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-9
What type of a process is secondary treatment of waste water?
(A)
Mechanical
(B)
Chemical
(C)
Biological
(D)
All the above
Question-10
Which is the largest river conservation project in India?
(A)
YAP
(B)
GAP
(C)
GCP
(D)
YCP
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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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