Solid State (Chapter Test - Non-Medical) - Class 12 MCQ

In a cubic closest packed structure of mixed oxides, the lattice is made up of oxide ions, 20% of tetrahedral voids are occupied by divalent X2+ ions and 50% of the octahedral voids are occupied by trivalent Y3+ ions. The formula of the oxide is

In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centred
positions. If one atom of B is missing from one of the face centred points, the formula of the compound is

A solid AB has NaCl type structure with edge length 580.4 pm. The radius of A+ is 100pm. What is the radius
of B– ?

The unit cell in a body centred cubic lattice is given in the figure. Each sphere has a radius ‘r’ and the cube
has side ‘a’ . What fraction of the total cube volume is empty

A metal crystallises in bodycentred cubic structure. Choose the correct statement amongst the following

How many unit cells are present in a cube-shaped ideal
crystal of NaCl of mass 1 g ?

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 compound would be

Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper atom ?

Which of the following statement is not correct about the defects in crystals ?

Calculate the percentage of volume unoccupied of packing in case of a metal crystal for primitive cubic.

In a compound, atoms of element Y form ccp lattice and those of element X occupy 2/3rd of tetrahedral voids.
The formula of the compound will be

A solid is formed with three types of atoms A, B and C. A forms fcc lattice, while B atoms occupy all tetrahedral voids and C atoms occupy half of the octahedral voids. The formula of the solid is

Consider the ionic and covalent solid crystal structures and select incorrect statement ?

Each rubidium halide crystallizing in the NaCl type lattice has a unit cell length 30 pm greater than for corresponding potassium salt (r_K = 133 pm) of the same halogen. What is the ionic radius of Rb+ ?

The correct statements regarding defects in solids is(are)

X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm^–2 and its atomic mass is 197 u.

Q. The length of the edge of the unit cell will be

X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm^–2 and its atomic mass is 197 u.

Q.

Assuming the metal atom to be spherical, its radius will be