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.

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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

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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

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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

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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

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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

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Answer: Silviculture

147 Who started chipko andalon?

A Sundar lal Bahuguna

B Medha patkart

C A. K. Banerjee

D Amrita devi bisni

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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