AIIMS 2018 Chemistry Isomerism MCQ Question
Assertion : All bond angles in Isobutene, , are different.
Reason : (Methyl group) show steric crowding
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
In isobutene (C₄H₈), the carbon atoms are arranged in a branched structure, resulting in bond angles of approximately 120° around the sp² hybridized carbon atoms due to trigonal planar geometry. This assertion is true, and the reason is that the presence of a double bond between one of the carbon atoms leads to this specific hybridization and bond angle, making it the correct explanation.
Option B is incorrect because while both statements are true, the reason directly explains the assertion. Options C and D are incorrect as they misrepresent the truth of the assertion and the reason, which are both valid in this context.
Found an issue with this question?
Related Questions
More from Organic Chemistry
How many total carbons are found in palmitic acid?
In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe³⁺ due to the formation of -
How many geometrical isomers are possible in the following two alkenes? (i) CH₃−CH=CH−CH=CH−CH₃ (ii) CH₃−CH=CH−CH=CH−Cl