19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Crystals can be classified into basic crystal habits equal to
The two dimensional coordination number of a molecule in square close packed layer is
Solid CO₂ is an example of
Which of the following is a pseudo solid
Which of the following is an example of metallic crystal solid
Which of the following is non-crystalline solid
NaCl is an example of
In ccp arrangement the pattern of successive layers can be designated as
The unit cell of aluminium is a cube with an edge length of 405 pm. The density of aluminium is 2.70 g cm –3. What is the structure of unit cell of aluminium?
How many lithium atoms are present in a unit cell with edge length 3.5 Å and density 0.53 gcm –3? (Atomic mass of Li = 6.94)
In graphite, carbon atoms are joined together due to
Which of the following is a molecular crystal
Particles of quartz are packed by
Mostly crystals show good cleavage because their atoms, ions or molecules are
A crystalline solid
Among solids the highest melting point is established by
Which of the following is an example of covalent crystal solid
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
Diamond is an example of
Which of the following is an example of ionic crystal solid
Which one of the following forms a molecular solid when solidified?
An element with atomic mass 100 has a bcc structrue and edge length 400 pm. The density of element is
The number of atoms present in unit cell of a monoatomic substance of simple cubic lattice is