Advertisements
Advertisements
प्रश्न
The yellow colour in NaCl crystal is due to ____________.
विकल्प
excitation of electrons in F centers
reflection of light from Cl− ion on the surface
refraction of light from Na+ ion
all of the above
Advertisements
उत्तर
The yellow colour in NaCl crystal is due to excitation of electrons in F centers.
APPEARS IN
संबंधित प्रश्न
Name the parameters that characterize a unit cell.
Which of the following lattices has the highest packing efficiency (i) simple cubic (ii) body-centred cubic and (iii) hexagonal close-packed lattice?
An ionic crystal lattice has limiting value of radius ratio as 0.414 to 0.732; the co-ordination number of its cation is _______.
(A) 6
(B) 4
(C) 3
(D) 12
Complete the following statement by selecting the correct alternative from the choices given:
In a face-centered cubic lattice, atom (A) occupies the comer positions and atom (B) occupies the face centre positions. If one atom of (B) is missing from one of the face-centered points, the formula of the compound is:
In a solid atom M occupies ccp lattice and `(1/3)` of tetrahedral voids are occupied by atom N. find the formula of solid formed by M and N.
Crystals can be classified into basic crystal units, equal to ____________.
The lattice site in a pure crystal cannot be occupied by ______.
AB crystallises in a body centred cubic lattice with edge length' a' equal to 387 pm The distance between two oppositely charged ions in the lattice is:
A particular solid is very hard and has a high melting point. In solid state, it is a non-conductor and in molten state, it is a conductor of electricity. Classify the solid ______.
How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g? [Atomic masses: Na = 23, Cl = 35.5]
