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Select correct option for True (T) and F...

Select correct option for True (T) and False (F)
(i) In the unit cell of NaCl there are `4Na^(+)Cl^(-)` units present.
(ii) At very high temperature paramagnetic substance changes to ferromagnetic substance.
(iii) `CrCO_2` is ferromagnetic and has conductivity as that of metal.
(iv) Solid ammonia is molecular solid having low melting point.

A

TFTT

B

TTTT

C

FFFT

D

TFTF

Text Solution

Verified by Experts

The correct Answer is:
A
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