HARD
JEE Main
IMPORTANT
Earn 100

An excess of potassium ions make KCl crystals appear violet or lilac in colour since

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Important Questions on Solid State

MEDIUM
JEE Main
IMPORTANT
Which of the following defects decreases the density?
 
MEDIUM
JEE Main
IMPORTANT
What happens when ferromagnetic Fe3O4 is heated to 850 K and why?
EASY
JEE Main
IMPORTANT
In what condition, mercury starts behaving as a superconductor?
HARD
JEE Main
IMPORTANT
The length of a unit cell in the nickel crystal is 0.352 nm. Diffraction of X-rays of 0.154 nm wavelength from a nickel crystal occurs at 22.2°, 25.9°, and 38.2°. Show that these data are consistent with a face-centered cubic crystal structure.
EASY
JEE Main
IMPORTANT
Which oxide is used to make magnetic tapes? Which kind of magnetism is shown by this oxide?