In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Here, we have provided case based/passage based questions for Class 10 Science Chapter 4 Carbon and Its Compounds.
Case Study/Passage Based Questions
Read the following and answer any four questions from (i) to (v).
The compounds which have the same molecular formula but differ from each other in physical or chemical properties are called isomers and the phenomenon is called isomerism. When the isomerism is due to difference in the arrangement of atoms within the molecule, without any reference to space, the phenomenon is called structural isomerism. In other words. structural isomers are compounds that have the same molecular formula but different structural formulas, i.e., they are different in the order in which different atoms are linked. In these compounds, carbon atoms can be linked together in the form of straight chains, branched chains or even rings.
(i) Which of the following sets of compounds have same molecular formula?
(a) Butane and iso-butane
(b) Cyclohexane and hexene
(C) Propanal and propanone
(d) All of these
AnswerAnswer: (d) All of these
(ii) In order to form branching, an organic compound must have a minimum of
(a) four carbon atoms
(b) three carbon atoms
(c) five carbon atoms
(d) any number of carbon atoms.
AnswerAnswer: (a) four carbon atoms
(iii) Which of the following is an isomeric pair?
(a) Ethane and propane
(b) Ethane and ethene
(c) Propane and butane
(d) Butane and 2-methylpropane
AnswerAnswer: (d) Butane and 2-methylpropane
(iv) Among the following the one having longest chain is
AnswerAnswer: (C) 2-methylpentane
(v) The number of isomers of pentane is