Properties of Solids

Q.

Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?

Q.

Which of the following exists as covalent crystals in the solid state?

1. Iodine

2. Silicon

3. Sulphur

4. Phosphorus

Q. Arrange the following type of solid in the increasing order of melting point

1. $\mathrm{Ionic}\mathrm{solids}$
2. $\mathrm{Non}-\mathrm{polar}\mathrm{molecular}\mathrm{solids}$
3. $\mathrm{Hydrogen}\mathrm{bonded}\mathrm{molecular}\mathrm{solids}$
4. $\mathrm{Covalent}\mathrm{solids}$

Q. Which of the following is not a characteristic properties of a solid state?

1. Definite shape
2. Incompressible
3. Large intermolecular distances
4. Fixed positions of the constituent particles

Q.

Which of the following conditions favours the existence of a substance the solid state ?

(a) Hight temperature (b) Low temperature

(c) High thermal energy (d) Weak cohesive forces

Q. Choose the incorrect statement(s) about solids :

1. They undergo little thermal expansion.​
2. They have low density.
3. They have strong intermolecular forces.
4. They have low diffusibility.

Q. $Si{O}_2$ is a covalent solid. Which of the following is most likely to be true regarding $Si{O}_2$?

1. It has a low melting point and it conducts electricity when melted
2. It conducts electricity as a solid and its melting point cannot be predicted
3. It has a high melting point and it conducts electricity when melted
4. It has a high melting point and it doesn’t conduct electricity when melted

Q.

List the important sources of sulphur.

Q.

Why are solids incompressible ?

Q. Which of the following are the characteristics of an amorphous solid?
A. Short range order
B. Sharp melting point
C. Isotropic in nature
D. Definite heat of fusion

1. A, D
2. A, C
3. A, C, D
4. B, D

Q.

Why are solids rigid?

Q. Which of the following type of solid act as insulator in solid state but conductor in liquid state?

1. Non-polar molecular solid
2. Metallic solid
3. Polar molecular solids
4. Ionic solid

Q. The characteristic features of solids are

1. Definite shape
2. Definite size
3. Definite shape and size
4. Definite shape, size and rigidity

Q.

On the basis of molecular theory, explain why a solid cannot flow but can be heaped.

Q.

Explain the arrangement of molecules in solid?

Q. Among the following which crystal will be soft and have low melting point

1. Covalent
2. Molecular
3. Metallic
4. Ionic

Q.

Intermolecular forces of attraction in NaCl is __than water.

Q.

Carbon compounds have low melting points.

1. True
2. False

Q. Wax is an example of

1. Ionic crystal
2. Covalent crystal
3. Metallic crystal
4. Molecular crystal
   
   

Q.

How can you justify that a table is solid?

Q.

If a non-metal is added to the interstitial sites of a metal then the metal becomes

1. Less tensile

2. Softer

3. Less malleable

4. More ductile

Q.

Solid CO₂ is an example of

1. Molecular crystal

2. Ionic crystal

3. Covalent crystal

4. Metallic crystal

Q.

Why Solid State Reactions Are Difficult?

Q. ntwhen a metal is burnt, its mass increases by 50%. the equivalent weight of metal is?n

Q.

What are the two general properties of solids?

Q.

The molecules of a substance are held together by ___________________force of attraction.

Q.

Solid have

1. Definite volume , definite shape and are not compressible

2. Definite volume, no definite shape and are highly compressible

3. Definite volume, no definite shape and are slightly compressible

4. No definite volume, no definite shape and are highly compressible

Q.

How does amorphous silica differ from quartz?

Q.

How are XeO₃ and XeOF₄ prepared?

Q. A white substance melts and decomposes at ${730}^{\circ }\text{C}$. As a solid, it is a non-conductor of electricity but it dissolves in water to form a conducting solution. The white substance is a/an:

1. Covalent network solid
2. Ionic solid
3. Molecular solid
4. Metallic solid