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For the Daniell cell Zn| Zn^(2+) || Cu^...

For the Daniell cell ` Zn| Zn^(2+) || Cu^(2+) | Cu` with The questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses :
` Fe_3O_4` is paramagnetic at room temperature and becomes ferromagnetic at ` 850 K`.
The randomization of spin takes place whith temperature.

A

If both assertion and reason are terue and the reason is the correct explanation of the assertion .

B

If both assertion ans reason are true but reason is not the correct explanation of the assertion .

C

If assertion is true but reason is false .

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
`Fe_(3)O_(4)` is ferronagetic at room tempreature and becomes pramagnetic at `850 K` due to randomization of spin with temperature.
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