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Vectors and Its Types

i Write the t...

Question

(i) Write the type of magnetism observed when the magnetic moments are oppositely aligned and cancel out each other.

(ii) Which stoichiometric defect does not change the density of the crystal?

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Solution

(i) Antiferromagnetism

$↑↓↑↓↑↓$

(ii) Frenkel defect

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Q. (i) Write the type of magnetism observed when the magnetic moment are oppositely aligned and cancel out each other?
(ii) Which stoichiometric defect does not change the density of the crystal?

Q. (i) Write the type of magnetism observed when the magnetic moments are aligned in parallel and anti-parallel directions in unequal numbers.

(ii) Which stoichiometric defect decreases the density of the crystal ?

Q. (i) Write the type of magnetism observed when the magnetic moment are aligned in parallel and anti-parallel directions in unequal numbers?
(ii) Which stoichiometric defect decreases the density of the crystal?

Q. Examine the given defective crystal.

\begin{matrix} X^{+} & Y^{-} & X^{+} & Y^{-} & X^{+} Y^{-} & O & Y^{-} & X^{+} & Y^{-} X^{+} & Y^{-} & X^{+} & O & X^{+} Y^{-} & X^{+} & Y^{-} & X^{+} & Y^{-} \end{matrix}

Answer the following questions :

(i) Is the above defect stoichiometric or non-stoichiometric?
(ii) Write the term used for this type of defect. Give an example of the compound which shows this type of defect?
(iii) How does this defect affect the density of the crystal?

The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains ...........

(a) get oriented in the direction of the applied magnetic fiels

(b) get oriented opposite to the direction of the applied magnetic fiels

(c) are oppositely oriented with respect to each other withot the application of magnetic field

(d) cancel out each other's magnetic moment

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