We do not clean natural ponds or lakes, whereas an aquarium or a swimming pool needs to be cleaned regularly. Why?
We do not clean natural ponds or lakes, whereas an aquarium or a swimming pool needs to be cleaned regularly. Why?
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Solution and Explanation
Natural ponds and lakes have a self-cleaning system where natural processes such as filtration, sedimentation, and biological processes help maintain water quality. However, aquariums and swimming pools are enclosed and do not have these natural processes, which is why they require regular cleaning and maintenance to prevent the accumulation of waste and maintain clean water.
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Read the following source and answer the questions that follow:
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Besides banks, the other major source of cheap credit in rural areas are the co-operative societies. Members of a co-operative pool their resources for co-operation in certain areas. There are several types of co-operatives possible such as farmers co-operatives, weavers co-operatives, industrial workers co-operatives etc. Krishak Co-operative functions in a village not very far away from Sonpur. It has 2300 farmers as members. It accepts deposits from its members. With these deposits as collateral, the co-operative has obtained a large loan from the bank. These funds are used to provide loans to members. Once these loans are repaid, another round of lending can take place. Krishak Co-operative provides loans for the purchase of agricultural equipment, loans for cultivation and agricultural trade, fishery loans, loans for construction of houses and for variety of other expenses.- CBSE Class X - 2025
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Read the following source and answer the questions that follow:
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The Independence Day Pledge, 26 January 1930
“We believe that it is the inalienable right of the Indian people, as of any other people, to have freedom and to enjoy the fruits of their toil and have the necessities of life, so that they may have full opportunities of growth. We also believe that if any government deprives people of these rights and oppresses them, the people have a further right to alter it or abolish it. The British Government in India has not only deprived the Indian
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