CBSE Class 11 Chemistry Some Basic Concepts of Chemistry MCQs Set B
Question: A mixture of sand and iodine can be separated by a) sublimation b) crystallisation c) distillation d) fractionation Answer: sublimation Question: Difference in density is the basis of a) gravity separation b) molecular sieving c) ultrafiltration d) molecular attraction Answer: ...
Question: Which of the scientist were able to prove that atom is no longer non-divisible? a) Michael Faraday b) Chadwick c) Dalton d) Thomson Answer: Michael Faraday Question: Which of the following is never true for cathode rays ? a) They are electromagnetic waves. b) They produce heat. c...
Question: Periodic classification of elements is used to examine the a) Both b) periodic trends in physical properties of elements c) periodic trends in chemical properties of elements d) None of these Answer: Both Question: Cl, Br, I, if this is Dobereiner’s triad and the atomic masses of...
Question: The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a a) chemical bond b) ionic bond c) chemical compound d) covalent bond Answer: chemical bond Question: The evolution of various theories of valence and the...
Question: Which of the following is not a type of van der Waal'sforces? a) Ion - dipole forces b) London forces c) Dipole - induced dipole forces d) Dipole - dipole forces Answer: Ion - dipole forces Question: Who proposed the concept of dispersion force ? a) Fritz London b) van der Waal c...
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CBSE pioneered in providing digital academic documents through its academic repository called “Parinam Manjusha” and DigiLocker. As on now result data from 2004 till this year is available in the repository. Approx. 12 crores digital academic documents are available...
The CBSE Science Challenge - 2020 Science is inexplicably linked with our lives and helps us to understand the world around us better. Scientific and technological developments contribute to progress and help improve our standards of living. By engaging with this...
As you are aware, Republic Day is celebrated every year on 26th January to honour the Constitution and Republic of our country. Celebration of this occasion annually helps youth and children of our country to be aware of the significance of Indian Constitution, unity...
BRICSMATH.COM is an annual International Online Competition in Mathematics, for students of classes I – XII of 07 BRICS countries (Brazil, Russia, India, China and South Africa, Indonesia and Vietnam). The competition is held online on the website www.bricsmath.com and...
Tricks for Proper Utilization of Add-On 15 Minutes introduced in CBSE Board Exams The intend of this article is to share the best suggestions and guidelines to utilize the extra 15 minutes provided for reading the question paper in CBSE Board Examination. These extra...