Properties of Solids

Q. Explain the cooling curve in crystalline and amorphous solids.

Q. wht is saturated vapour pressure

Q.

Solid ${\mathrm{CO}}_2$ is an example of which crystal?

Q. 40. When a metal is burnt in presence of oxygen, its weight is increased by 25%. The equivalent weight of the metal will be

Q.

Statement: The amorphous solids are isotropic.

1. True
2. False

Q.

The number of waves in the third orbit of hydrogen atom is?

Q.

Diamond is an example of

1. Solid with hydrogen bonding
2. Electrovalent solid
3. Covalent solid
4. Glass

Q. what is the pressure and temperature at NTP and STP?

Q.

21. Identify the wrong statement among the following

1. Molecules of solids possess only vibratory motion.

2. Solids are incompressible.

3. Solids have only one free surface.

4. Gases are highly diffusible.

Q.

London force is observed only in non-polar molecules. (True or False)

1. False

2. True

Q. silica which type of solid (crystalline/amophus

Q.

Explainthe physical significance of Van der Waals parameters.

Q.

Give reasons for the following statements.

The molecules of chalk vibrate around their fixed position.

Q. 20.If Z is a compressibility factor, van der Waals equation at low pressure can be written as

Q. What is difference between aqueous tension and vapour pressure of water?

Q.

liquis take the shape of the container in which they ae placed . why?

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.

Diamond is

1. Soft

2. Slippery in nature

3. Hardest known substance

4. None of these

Q.

$18.0$ g of water completely vapourises at ${100}^{o}C$ and 1 bar pressure and the enthalpy change in the process is $40.79kjmo{l}^{-1}$. What will be the enthalpy change for vapourising two moles of water under the same conditions? What is the standard enthalpy of vapourisation for water?

Q. 6. 200g of ice at -20^° C is mixed with 500g of water at 20^° C in an insulating vessel.Final masd of water in vessel is (Specific heat of ice = 0.5 cal per gram per degree Celsius

Q. Define surface tension of liquid?

Q. Normal temperature = ? Normal pressure = ? Standard temperature = ? Standard pressure = ?

Q.

Fill in the blank spaces by choosing the correct words from the list given below:

List: motion, space, mass, molecule, elements, atom, shape, changes, cohesion, rigid, hard, adhesion, intermolecular

The solids are generally _________ and _________.

Q. A Metal oxide contains 60% metal by mass.the equivalent weight of metal is??

Q. Q. CO2 can be easily liquified and even solidified due to ____________ phenomenon. Tell reason too (i) it has more force of attraction than in any other gas in air. (ii) It has more intermolecular space (iii) It has weak forces of attraction. (iv) It is present in atmosphere.

Q. For a given solid, the following arrangement of particles is observed :


Choose the property that is represented by the above arrangement of solid particles along AB and CD direction :

1. Isotropy
2. Amorphous nature
3. None of the above
4. Anisotropy

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 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. If we have a pure $MgC{O}_3$ sample that contains a total of $1.26\text{millimoles}$ of electrons and if the number of moles of $MgC{O}_3$ present in the sample is $x\times {10}^{-5}$, then the value of $x$ is:

Q. Which out of the three states of matter has highest thermal energy ?