19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Xenon crystallises in the fcc lattice and the edge of the unit cell is 620 pm. The nearest neighbour distance of Xe is
The maximum proportion of available volume that can be filled by hard spheres in diamond is
The correct order of the packing efficiency in different types of unit cell is …A… Here, A refers to
Packing efficiency of simple cubic lattice is …A… Here, A refers to
The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is
Amorphous substances show (1) Short and long range order (2) Short range order (3) Long range order (4) Have no sharp M.P.
Amorphous solids are
Crystalline solid is
A crystalline solid
Mostly crystals show good cleavage because their atoms, ions or molecules are
Among solids the highest melting point is established by
Which of the following is a molecular crystal
Solid CO2 is an example of
In graphite, carbon atoms are joined together due to
Particles of quartz are packed by
Which of the following is an example of covalent crystal solid
Diamond is an example of
Which of the following is an example of metallic crystal solid
Which of the following is an example of ionic crystal solid
Glass is
The property of crystalline solid is not
Which one of the following forms a molecular solid when solidified?
The formula for determination of density of unit cell is (a) a N g cm N M A x x (b) M g cm a N A Z x x (c) a M g cm N N A x x (d) M N g cm a N A x x
In ccp arrangement the pattern of successive layers can be designated as
The two dimensional coordination number of a molecule in square close packed layer is