19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which one of the following is a covalent crystal? [KCET 2011]
Aluminium has fcc structure. The length of the unit cell is 404 pm. If the density of the metal is 2.7 g cm–3, the molar mass of Al atom is
An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces of the cube. The empirical formula for this compounds would be
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is
A solid AB has NaCl structure. If the radius of cation A+ is 170 pm. Calculate the maximum possible radius of the anion B (WB JEE 2013)
The ratio of close-packed atoms to tetrahedral holes in cubic close packing is
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?
An element (atomic mass = 100 g/mol) having bcc structure has unit cell edge 400 pm. Then density of the element is
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)
Potassium has a bcc structure with nearest neighbour distance 4.52 Å. Its atomic weight is 39. Its density will be
A metal has bcc structure and the edge length of its unit cell is 3.04Å. The volume of the unit cell in cm will be
The number of atoms in 100 g of an FCC crystal with density d = 10 g cm –3 and cell edge as 200 pm is equal to
Which of the following is an example of network solid? (AIIMS 2018) (a) SO Solid (b) 2I
An element with atomic mass 100 has a bcc structrue and edge length 400 pm. The density of element is
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
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 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…
An element has a body-centred cubic (bcc) structures with a cell edge of 444 pm. The density of the element is 7.2 g/cm3. How many atoms are present in 404 g of the element?
Sodium metal crystallizes as a body centred cubic lattice with the cell edge 4.29Å. What is the radius of sodium atom.
Ag forms ccp lattice and X-ray studies show that the edge length of its unit cell is 408.6 pm. Find the density of silver. (Given that atomic mass of silver = 107.9 u)
The correct option for the number of body centred cubic unit cells in all 14 types of Bravais lattice unit cells is: [NEET 2021]
The number of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is
A solid A+B– has the B– ions arranged as below. If the A+ ions occupy half of the octahedral sites in the structure. The formula of solid is
For the structure of solid given below if the lattice points represent A+ ions & the B– ions occupy all the tetrahedral voids then coordination number of A is
Mostly crystals show good cleavage because their atoms, ions or molecules are