Question : Directions: A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
?, Hexane, Heptane, Octane
Option 1: Pentane
Option 2: Benzene
Option 3: Nonane
Option 4: Methane
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Correct Answer: Pentane
Solution :
Given:
?, Hexane, Heptane, Octane
The order is as follows –
Hexane (alkane of 6 carbon atoms) < Heptane (alkane of 7 carbon atoms) < Octane(alkane of 8 carbon atoms)
So, Pentane (alkane of 5 carbon atoms) is the missing term of the given series. Hence, the first option is correct.
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