19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following is an example of network solid? (AIIMS 2018) (a) SO Solid (b) 2I
Niobium crystallises in body centred cubic structure. If density is 8.55 g cm-3, then the atomic radius of niobium is (atomic mass of niobium = 93u) (AllMS 2018)
An alloy of Cu, Ag and Au is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centre and gold is present at body centre, the alloy has a formula
An atom forms face centred cubic crystal with density d = 8.92g/mL and edge length a 3.6 10 cm x . The molecular mass of atom in amu is (JIPMER 2018)
In a crystalline solid, having formula XY2O4, oxide ions are arranged in cubic close packed lattice while, cations X are present in tetrahedral voids and cations Y are present in octahedral voids. The percentage of te…
A compound is formed by elements A and B. This crystallizes in the cubic structure when atoms A are the corners of the cube and atoms B are at the centre of the body. The simplest formula of the compound is
In a cubic structure of compound which is made from X and Y, where X atoms are at the corners of the cube and Y at the face centres of the cube. The molecular formula of the compound is
In a face centred cubic arrangement of A and B atoms when A atoms are at the corner of the unit cell and B atoms of the face centres. One of the A atom is missing from one corner in unit cell. The simplest formula o…
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
A solid is formed by two elements P and Q. The element Q forms cubic close packing and atoms of P occupy one third of tetrahedral voids. The formula of the compound is [AMU 2010]
Which of the following compounds shows both Frenkel and Schottky defects [AMU 2010]
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
A compound contains two types of atoms X and Y. It crystallises in a cubic lattice with atoms X at the corners of the unit cell and atoms Y at the body centre. The simplest possible formula of this compound is
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
In hcp arrangement, the number of nearest neighbours are
What is the coordination number of body centre cubic lattice?
Contribution of each atom per unit cell at face centre in a fcc unit cell is
If the number of atoms per unit cell in a crystal is 2, the structure of crystal is
The number of atoms or molecules contained in one body centered cubic unit cell is
The number of atoms contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is