Wich Of D Followin Statements is/are Wrong:!~

1. for NaCl, r=a/2!~

2. If the temperature is increased  den ferrimagnetic nd ferromagnetic substance bcum paramagnetic!~

3. If d temperature decreases den paramagnetic bcums feromagnetic!~

4. MnO₂ has  zero dipole

5. Curi temperature is related with Ferromagnetism!~

1- False.

First of all, which r are you talking abt? r of Na or r of Cl? Anyways, if the question is taking r of Na=r of Cl, then also, r=a/4.

3- True

5- True

The temperature of transition from ferromagnetic to paramagnetic character is called curie temp.

1)MAY B FALSE

2)TRUE

3)..CAN B TRUE COZ PARAMAGNETIC SUSPECTIBILITY INVERSLY PROPOTIONAL..2 TEMP...

4) Mn HAS OX NO...HERE +2...SO UNPAIRED ELCTRONS PRSNT ...SO FALSE...

5)TRUE...

1) FALSE              SEE NACL  is associated with FCC so     .......... r=a/2*2^1/2

2) TRUE               IT's called curie temp    i.e.  X=C/T   where c is curie constant

3)TRUE   again

4)FALSE    Mn has got unpaired electrons

5)TRUE

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