CBSE Class 11-science Questions and Answers

If you are looking for Class 11 Science online study materials, you’ve come to the right place. On TopperLearning, you’ll find quality e-learning materials for subjects such as Physics, Chemistry, Biology, Mathematics, and Hindi. These study materials include sample papers, MIQs, textbook solutions, video lessons and more.

Understand the course structure and exam paper pattern by going through the latest CBSE Class 11 Science syllabus. With access to the accurate list of syllabus topics, you’ll be able to create an appropriate study plan for your exams. Revision is key to remembering the key concepts learned in class. Get free access to the important revision notes for CBSE Class 11 science prepared by TopperLearning’s experts. Also, improve your Hindi writing skills with textbook solutions or understand concepts in Physics with our conceptual videos.

You just need to access your TopperLearning dashboard for utilising our compiled CBSE Class 11 Science study resources such as sample papers, NCERT solutions, syllabus, videos, revision notes and online mock tests. Study complex topics as per your convenience with our 24/7 access to CBSE Class 11 Science resources and score well in your CBSE final exams for Class 11.

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CBSE XI Science - Physics

An observer on moon observes angular diameter of earth as (σπ)0. If the distance between earth and moon is 3.84×108m and the radius of earth is 6400 km, the find the value of σ

Asked by akshataggarwal7704 | 3rd Mar, 2021, 10:52: PM

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CBSE XI Science - Physics

The frequency of stretched string depends upon length of string (l), tension in the string (t), and m per unit length (u) of the string. find the expression of vibration of string using method of dimension

Asked by tejpaljeet4 | 3rd Mar, 2021, 12:13: PM

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CBSE XI Science - Biology

Chemical nature of chitin is........... 

Asked by rjkalpeshtopper | 2nd Mar, 2021, 08:57: AM

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CBSE XI Science - Chemistry

what is reaction mechanism

Asked by deepthibai74 | 1st Mar, 2021, 11:13: AM

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CBSE XI Science - Physics

The speed of a particle of mass m, moving in a circle of radius r, is changing at a constant rate aT m/ s2. Write the expression for the magnitude of its instantaneous resultant acceleration. Can we say that the direction of this instantaneous resultant acceleration would be along the instantaneous (inward) radial acceleration

Asked by pranayshah1908 | 28th Feb, 2021, 12:18: PM

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CBSE XI Science - Biology

which part of the cellmembrane

Asked by at718764 | 25th Feb, 2021, 01:48: PM

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CBSE XI Science - Chemistry

What is Adsorption  

Asked by toshan.dandi5 | 24th Feb, 2021, 09:24: PM

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CBSE XI Science - Chemistry

When lead sulphide, PbS and lead oxide, PbO, are heated together the products are lead metal and sulphur dioxide, SO2. PbS(s) + 2PbO(s)rightwards arrow with heat on top  3Pb (l) + SO2 (g). If 14.0 g of lead oxide reacts according to the above equation, how many (a) moles of lead (b) grams of lead, (c) atoms of lead and (d) grams of sulphur dioxide are formed?  (Atomic mass : Pb = 207.0, S = 32.1 ; O =16.0)

Asked by seeni2005 | 24th Feb, 2021, 12:34: PM

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CBSE XI Science - Chemistry

  1) Calculate the number of Cl2 molecules and Cl atoms in 0.25 mol of Cl2 gas. 2)  Molar mass of O is 16 g  mol-1. What is the mass of one atom and one molecule of Oxygen?  

Asked by seeni2005 | 19th Feb, 2021, 12:52: PM

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CBSE XI Science - Chemistry

Hello sir Please clarify these two sums 1) Calculate the number of Cl2 molecules and Cl atoms in 0.25 mol of Cl2 gas. 2)  Molar mass of O is 16 g  mol-1. What is the mass of one atom and one molecule of Oxygen?

Asked by seeni2005 | 17th Feb, 2021, 11:19: AM

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