10th History Session 2022-23 Class 10 Social Science Important CBSE MCQ Solutions X History Terminal Exam Based Important MCQ Solutions Class X Social Science MCQ Extra Questions Answers
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NCERT Solutions for Class 10 Science and important questions for CBSE class 10 for session 2020-2021
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10th History Session 2022-23 X History Terminal Exam Based Important MCQ Solutions Class X Social Science MCQ Extra Questions Answers 10th HISTORY CBSC MCQ QUESTIONS ANSWERS
10th History Important MCQ Solutions Class 10th Social Science history Session 2022-23 10th History CBSC MCQ QUESTIONS ANSWERS Class X Social Science MCQ Extra important Questions Answers
Class 10th Social Science Session 2022-23 Class 10 Social Science Terminal Exams MCQ Solutions Class X Social Science MCQ Extra Questions Answers 10th Social Science Terminal Exam Based MCQ Extra Questions
(i) Non-biodegradable biological in origin. wastes are (ii) Biodegradable wastes are degraded by microorganisms such as bacteria and fungi. (iii) Biodegradable wastes enter the food chain and get biologically magnified. (iv)Non-biodegradable absorbed by plants from the soil. wastes are
Red light being of longest wavelength scatters least and reaches our eye while blue colour scatters most.
DDT is a non-bio degradable pesticide and when sprayed, it finds its way to soil from where it enters the food chain, the concentration of DDT increases progressively as we go up the trophic level due to biological magnification.
When pesticides and other non-biodegradable chemicals enter the food chain, these get accumulated progressively at each trophic level and this is known as biological magnification.
The sky appears blue due to excessive scattering of blue light by the air molecules.
The limited supply of air leads to incomplete combustion of fuel, which in turn leads to the production of black smoke.