Smartindia Classroom
CONTENTS
Biology
Chemistry
Computer
English
General Knowledge
Geography
History & Civics
Mathematics
Physics
Politics
Science (NCERT)
Back to home
Start Practice
Question-1
What type of a process is secondary treatment of waste water?
(A)
Mechanical
(B)
Chemical
(C)
Biological
(D)
All the above
Question-2
The secondary sludge can also be used as:
(A)
Land filler
(B)
Compost
(C)
Pesticide
(D)
Fuel
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
Which of the following programs was organized to prevent the river Ganga from being further polluted?
(A)
GAP
(B)
YAP
(C)
GPA
(D)
GPP
Question-5
Open rainwater drains may spread infectious diseases like:
(A)
Malaria
(B)
Dengue
(C)
Influenza
(D)
Cold
Question-6
Infectious bio medical wastes are produced from:
(A)
House
(B)
Industry
(C)
Hospital
(D)
Mine
Question-7
Discarded electronic devices are called:
(A)
Mechanical waste
(B)
Inorganic wastes
(C)
e-wastes
(D)
Solid waste
Question-8
In which sea is rapid eutrophication seen?
(A)
Red sea
(B)
Mediterranean sea
(C)
Arabian sea
(D)
All the above
Question-9
In which year was the Yamuna action plan launched?
(A)
1992
(B)
1990
(C)
1983
(D)
1993
Question-10
Which of the following effluents from sewage treatment plants contribute to eutrophication along with nitrogen fertilizers?
(A)
Phosphorus
(B)
Zinc
(C)
Phosphate
(D)
Magnesium
Your Score 0/10
Click
here
to see your answersheet and detailed track records.
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
Powered By
