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CBSE class 10 Science Quiz | CBSE class 10 Science Short Questions with Answers

141 In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because:
[A] Larger amount of potential energy is converted into kinetic energy.
[B] More water molecules dissociate into ions.
[C] Its temperature increases.
[D] The electricity content water increases with height.
Answer: Larger amount of potential energy is converted into kinetic energy.
142 Coke is more valuable when used:
[A] As a fuel in domestic ovens
[B] As a reducing agent
[C] As a fuel for industrial boilers
[D] As an oxidizing agent
Answer: As a reducing agent

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143 There are four fuels which all contain only carbon and hydrogen. The fuel having highest calorific value will be one which has:
[A] Less of carbon but more of hydrogen
[B] Less of carbon as well as less of hydrogen
[C] More of carbon but less of hydrogen
[D] Equal proportions of carbon and hydrogen
Answer: Less of carbon but more of hydrogen
144 A good fuel is one that possesses:
[A] Low calorific value and moderate ignition temperature
[B] High calorific value and moderate ignition temperature
[C] Low calorific value and low ignition temperature
[D] High calorific value and low ignition temperature
Answer: High calorific value and moderate ignition temperature
145 Which among the statements given below is incorrect?
[A] Sustainable development does not take into consideration the viewpoints of all stakeholders
[B] Sustainable development meets the current basic human needs along with preserving resources for future generations
[C] Sustainable development is a long planned and persistent development
[D] Economic development is linked to environmental development
Answer: Sustainable development does not take into consideration the viewpoints of all stakeholders
146 Which among the following is a major programme that was started to replenish the damaged forests?
[A] Silviculture
[B] Horticulture
[C] Agriculture
[D] Tissue culture
Answer: Silviculture
147 Who started chipko andalon?
[A] Sundar lal Bahuguna
[B] Medha patkart
[C] A. K. Banerjee
[D] Amrita devi bisni
Answer: Sundar lal Bahuguna
148 Among the following choose the correct option which includes acts related to the three R's strategy which can be useful for conserving our natural resources?
[A] Reduce, reuse, redistribute
[B] Reduce, recycle, reuse
[C] Recycle, regenerate, reuse
[D] Reduce, regenerate, reuse
Answer: Reduce, recycle, reuse
149 Government launched the ‘Ganga Action Plan’ (GAP) project in 1985. The main purpose of this project was to:
[A] Make its water pollution free
[B] Promote the growth of water animals like fish, in the river
[C] Build new dams over the Ganga river
[D] Utilise the river water for irrigation purposes
Answer: Make its water pollution free
150 Which among the following is an eco-friendly activity?
[A] Making use of dyes for colouring the clothes
[B] Making windmill to generate power for irrigation
[C] Making use of automobiles
[D] Making use of poly bags for shopping
Answer: Making windmill to generate power for irrigation
151 Which among the following was a message conveyed by the ‘Chipko Movement’?
[A] To promote more and more developmental projects
[B] To involve the community in forest conservation efforts
[C] To ignore the forest conservation efforts in sake of development
[D] None of these
Answer: To involve the community in forest conservation efforts
152 Global warming is a phenomenon related to:
[A] Greenhouse effect
[B] Desertification
[C] Evaporation
[D] Ecological balance
Answer: Greenhouse effect
153 Which of the following substances will not be converted to compost when added in a composting pit?
[A] Plastic bags
[B] Human and animal excreta
[C] Waste paper
[D] Fruit and vegetable peels
Answer: Plastic bags
154 What will happen if deer is missing in the food chain given below? Grass → Deer → Tiger
[A] The population of tiger increases
[B] The population of grass decreases
[C] Tiger will start eating grass
[D] The population of tiger decreases and the population of grass increases
Answer: The population of tiger decreases and the population of grass increases
155 Which of the following radiations is responsible for the conversion of atmospheric oxygen to ozone?
[A] Infrared radiations
[B] Ultraviolet radiations
[C] Gamma radiations
[D] Cosmic radiations
Answer: Ultraviolet radiations
156 Which among the following is a correct full form for DDT?
[A] Dichlorodiphenyltrichloroethane
[B] Dichlorodiethyltrichloroethane
[C] Dichlorodiphenyltetrachloroethane
[D] None of these
Answer: Dichlorodiphenyltrichloroethane
157 The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as:
[A] Chemical magnification
[B] Biological accumulation
[C] Biological magnification
[D] None of these
Answer: Biological magnification
158 Green plants utilize ……… percent of sun’s energy to prepare their food by the process of photosynthesis?
[A] 99 percent
[B] 1 percent
[C] 10 percent
[D] 20 percent
Answer: 1 percent
159 In a food chain the second trophic level is occupied by:
[A] Herbivores
[B] Producers
[C] Carnivores
[D] Autotrophs
Answer: Herbivores
160 Which among the following statements is incorrect in view of the plants?
[A] They convert the solar energy into mechanical energy
[B] They prepare their food from organic compounds
[C] They are also called producers
[D] They are the initial source of energy in a food chain
Answer: They prepare their food from organic compounds

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