The solid NaCl is a bad conductor of electricity since
In solid NaCl, there is no velocity of ions
Solid NaCl is a bad conductor of electricity because ions are not free to move.
When a certain crystal was studied by the Bragg technique using X – rays of wavelength 229 pm, an X – ray reflection was observed at an angle of 230 20’. What is the corresponding interplanar spacing? [sin (23020’) = 0.396]
Potassium fluoride has NaCl type structure. What is the distance between K+ and F- ions if cell edge is a cm?
Which defect causes decreases in the density of crystal?
The correct statement regarding F – centre is
Schottky defect in crystals is observed when
Frenkel defect is caused due to
An example of a non – stoichiometric compound is
A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behavior is the characteristic of substances forming.
Amorphous substances show
(i) short and long range order
(ii) short range order
(iii) long range order
(iv) have no sharp melting point
The correct statement in the following is