Assertion :Each electron in an atom has two spin quantum numbers. Reason: Spin quantum numbers are obtained by solving Schrodinger wave equation.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
Both Assertion and Reason are incorrect.
Each electron in an atom has only one spin quantum number.
The spin quantum number 's' accounts for electron spin. An electron can spin clockwise or anticlockwise, in two opposite directions. There are two possible values of 's' that are equal and opposite. The probability of rotation in one direction is only one half. Hence, spin quantum number can have two values $+ \frac{1}{2}$ and $- \frac{1}{2}$ .

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ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

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