Chemistry Fill In The Blanks.

Stoichiometric defects in an ionic solid is also called …………… or …………… defect.

…………… is the appearance of an electrical potential across the sides of the crystal, when it is subjected to mechanical stress.

…………… arises due to the presence of less number of cations than the anions.

Zno is …………… at room temperature but when it is heated it becomes in colour.

…………… arises due to the presence of more number of metalions as compared to anions.

…………… arises due to the dislocation of ions from its crystal lattice.

Vanadium monoxide shows …………… defect.

Presence of large number of schottky defects in a crystal, lowers its ……………

…………… defect arises due to the missing of equal number of cations and anions from the crystal lattice.

The packing efficiency of fee unit cell is ……………

In both …………… and …………… arrangements, the coordination number of each sphere is 12.

If third layer arrangement is abc arrangment, it is known as …………… arrangement.

If the third layer arrangement is aba arrangement, it is called …………… arrangement.

In bcc cubic pattern …………… of the available volume is occupied.

Of all the metals in the periodic table, only …………… crystallizes in simple cubic pattern.

Only …………… of the available volume is occupied by the spheres in simple cubic packing

…………… is the most powerful tool for the determinaiton of crystal structure.

The number of atoms in a fee unit cell is ……………

The number of atoms in bcc unit cell is ……………

Each atom in the comer of cubic unit cell is shared by …………… neighbouring unit cells.

The coordination number of bcc is ……………

There are …………… primitive crystal systems.

A unit cell that contains only one lattice point is called a ……………

The number of the nearest neighbours that surrounding a particle in a crystal is called the ……………

The basic repeating structural unit of a crystalline solid is called a ……………

The regular arrangement of the ions throughout the crystal is called a ……………

…………… solids possess excellent electrical and thermal conductivity.

Glucose and urea are generally …………… under room temperature.

In non polar molecular solids constituent molecules are held together by ……………

…………… is a component of many lubricants for example cycle chain oil.

In molecular solids, the neutral molecules are held together by weak ……………

Diamond and silicon carbide are the examples of …………… solids.

NaCl and KCl are the examples of …………… crystals.

Crystalline solids are …………… and they show different values of physical properties when measured along different directions.

…………… means uniformity in all directions.

Glass, Rubber, plastics are the examples of …………… solids.

Frozen elements of group 18 are called ……………

The best examples of covalent crystals are …………… and ……………

Naphthalene,Anthracene and glucose are examples of ……………