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

Questions
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
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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