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Home/Class 10/Class 10 Science

Category: Class 10 Science

NCERT Solutions for Class 10 Science and important questions for CBSE class 10 for session 2020-2021

Tiwari Academy Discussion Latest Questions

Sewak Ram
Poll
Sewak Ram
Asked: December 21, 2021In: Class 10 Science

In between two major seasons, Indian farmers take the best advantage of the brief interval during the summer and grow _____crops.

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

class 10 social science mcq solutionsclass 10th social science cbsc sample paper
  • 2 2 Answers
  • 20 Views
  • 3 Votes
Answer
Rajan Duby
Poll
Rajan Duby
Asked: December 20, 2021In: Class 10 Science

Belgium has worked on the principles of:

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

class 10 social science mcq solutionsclass 10th social science cbsc sample paper
  • 1 1 Answer
  • 5 Views
  • 2 Votes
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Madhu Mati
Poll
Madhu Mati
Asked: December 18, 2021In: Class 10 Science

Stable income is attained through

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 10 social science mcq solutionsclass 10th social science cbsc sample paper
  • 1 1 Answer
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Murti Lal
Poll
Murti Lal
Asked: December 16, 2021In: Class 10 Science

Which of the following method has been changed depending upon the characteristics of physical environment, technological know-how and socio- cultural practice?

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

class 10 social science mcq solutionsclass 10th social science cbsc sample paper
  • 1 1 Answer
  • 14 Views
  • 2 Votes
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Charlie
Poll
Charlie
Asked: December 16, 2021In: Class 10 Science

Which of the following statements are incorrect?

(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

class 10 science mcq solutionsclass 10th science cbsc sample paper
  • 1 1 Answer
  • 15 Views
  • 2 Votes
Answer
Amarjeet
Poll
Amarjeet
Asked: December 16, 2021In: Class 10 Science

At the time of sunrise and sunset

Red light being of longest wavelength scatters least and reaches our eye while blue colour scatters most.

class 10 science mcq solutionsclass 10th science cbsc sample paper
  • 1 1 Answer
  • 7 Views
  • 2 Votes
Answer
Charlie
Poll
Charlie
Asked: December 16, 2021In: Class 10 Science

It was observed that at places where DDT was used to control mosquitoes and other pests, the eggs of eagles would become fragile and break and the eagle almost became extinct. After DDT was banned by lawmakers, eagle population has recovered. The possible reason for this is:

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.

class 10 science mcq solutionsclass 10th science cbsc sample paper
  • 1 1 Answer
  • 120 Views
  • 2 Votes
Answer
Amarjeet
Poll
Amarjeet
Asked: December 16, 2021In: Class 10 Science

The phenomenon when concentrations of a harmful substance increases in organisms at higher trophic levels in a food chain or food web is:

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.

class 10 science mcq solutionsclass 10th science cbsc sample paper
  • 1 1 Answer
  • 14 Views
  • 2 Votes
Answer
Amarjeet
Poll
Amarjeet
Asked: December 16, 2021In: Class 10 Science

The colour of sky appears blue, it is due to the

The sky appears blue due to excessive scattering of blue light by the air molecules.

class 10 science mcq solutionsclass 10th science cbsc sample paper
  • 1 1 Answer
  • 10 Views
  • 2 Votes
Answer
Anu Joshi
Poll
Anu Joshi
Asked: December 16, 2021In: Class 10 Science

A student while walking on the road observed that a cloud of black smoke belched out from the exhaust stack of moving trucks on the road. Choose the correct reason for the production of black smoke:

The limited supply of air leads to incomplete combustion of fuel, which in turn leads to the production of black smoke.

class 10 science mcq solutionsclass 10th science cbsc sample paper
  • 1 1 Answer
  • 94 Views
  • 2 Votes
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