List of top Chemistry Questions on packing efficiency

What is the packing efficiency of simple cubic lattice?

A metal $M$ crystallizes into two lattices :- face centred cubic (fcc) and body centred cubic (bcc) with unit cell edge length of $20$ and $25 \,\mathring{A}$ respectively The ratio of densities of lattices fcc to bcc for the metal $M$ is ___(Nearest integer)

Atom X occupies the fcc lattice sites as well as alternate tetrahedral voids of the same lattice. The packing efficiency (in %) of the resultant solid is closest to

A metal exists as an oxide with formula $M_{0.96}O$. Metal $M$ can exist as $M^{2+}$ and $M^{3+}$ in its oxide $M_{0.96}O$. The percentage of $M^{3+}$ in the oxide is nearly

The yellow colour in $NaCl$ crystals is due to

An elemental crystal has a density of $8570 \,kg / m ^{3}$. The packing efficiency is $0.68$. The closest distance of approach between neighbouring atom is $2.86 \,?$. What is the mass of one atom approximately?

Total number of metal atoms per unit cell in a face-centred cubic lattice is

Percentage of free space in cubic close packed structure and in body centred packed structure are respectively

Percentage of free space in body centred cubic (bcc) unit cell is

Total volume of atoms present in a face centred cubic unit cell of a metal is ($r$ is atomic radius)

The fraction of total volume occupied by the atoms present in a simple cube is

Percentage of Se (at. mass $=78.4$ ) in peroxidase anhydrase enzyme is $0.5 \%$ by weight, then minimum molecular mass of peroxidase anhydrase enzyme is

The coordination number of metal crystallising in a hexagonal close packing is

The space occupied by b.c.c. arrangement is approximately

Total volume of atoms present in a face centred cubic unit cell of a metal is ( $ r= $ atomic radius)

The edge length of the unit cell of $NaCl$ crystal lattice is 5.623 ?, density is 2.16 $g cm^{-3}$ and the molar mass of $NaCl$ is $58.5\, g$ $mol^{-1}$. The number of moles per unit cell is

The available space filled in hexagonal close packing pattern in one layer is

Molecules from 10 ml of m molar solution are adsorbed on 0.24 cm>sup>2 area forming unimolecular layer. Adsorbed molecules are cubic in shape determined the edge length of cube -