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

What does the universal gas constant R signifies

Asked by Shailendrarawat79100 | 18th Feb, 2020, 12:20: PM

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CBSE XI Science - Physics

calculate gravitational potential energy of a mass 2kg at height 2m on a planet whose mass is 5 times that of the earth and radius is same as that of the earth.(take g as 10m/s2)

Asked by rajanichandu.aeroit | 17th Feb, 2020, 07:27: PM

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CBSE XI Science - Chemistry

(i) Balance the following equations by oxidation number method: (1) Cu + HNO3 → Cu (NO3)2 + NO2 + H2O) (2) K2Cr2O7 + HCl → KCl + CrCl3 + H2O + Cl2 (ii) Give reasons for the following: (1) HNO3 acts only as an oxidising agent while HNO2 can act both as a reducing agent and an oxidising agent. (2) Chlorine liberates iodine from KI solution. How will you convert the following? (Give balanced equation.) (1) Sodium acetate to methane Find the oxidation number of: (1) S in Na2S4 O6 2) S in S subscript 4 space O subscript 6 superscript 2 minus end superscript

Asked by defence221175 | 17th Feb, 2020, 06:10: PM

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CBSE XI Science - Chemistry

A.  give method and find hybridisation and shape of : 1. XeF2 2.SF2 3.I I to the power of negative 2 end exponent 4.IF7 5.SO subscript 4 superscript negative 2 end superscript B.Explain anti bonding and bonding hybridised orbitals. C._________on hydrolysis gives ethyne while ______ on hydrolysis gives methane. D.Explain why the colour of Bayer's reagent gets discharged when treated  with an alkene. E.i) State and explain Le Chatelier’s principle. On the basis of this principle discuss the conditions for obtaining the maximum yield of SO3 in the following reaction. 2SO2(g)+ O2(g)⇌2SO3(g); ∆𝐻= - 42k.cal.(ii) Calculate the pH value of 0.01M CH3 COOH if it is 5% dissociated.

Asked by defence | 17th Feb, 2020, 05:09: PM

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CBSE XI Science - Physics

(i) If you take a chair and tilt it such that it makes an angle theta with the ground, will pushing the chair be easier or pulling? (ii) If you take the same chair and don't tilt it, will pushing be easier or pulling?

Asked by kalpanasingh.ito | 16th Feb, 2020, 07:25: PM

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CBSE XI Science - Chemistry

carbon react with chlorine to form ccl4 .36gm of carbon was mixed with 142gmof ccl2.calculate mass of ccl4 produce and remaining mass of reactant  

Asked by aliadil96935 | 16th Feb, 2020, 05:46: PM

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CBSE XI Science - Mathematics

Find the range  f(x)= root 9-x^2 my doubt is that the answer says [0,3]. But since we have a square root, won't we get range [-3,3]?

Asked by fishtailfever | 15th Feb, 2020, 05:11: PM

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CBSE XI Science - Chemistry

Molecular orbital theory explanation

Asked by mandriosa67 | 13th Feb, 2020, 03:03: PM

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CBSE XI Science - Mathematics

In a triangle ABC, (b^2 - c^2) / (b^2 + c^2) = sin(B - C) / sin(B + C), prove that it is either a right-angled or isoceles triangle.

Asked by kandappan | 13th Feb, 2020, 01:40: PM

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CBSE XI Science - Mathematics

AB is a line of fixed length, 6 units, joining the points A(t,0) and B which lies on thepositive y axis. P is a point on AB distant 2 units from A. Express the coordinates of B and P in terms of t. Find the locus of P as t varies.

Asked by kandappan | 13th Feb, 2020, 01:39: PM

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