Question 2 :
The nature of bonds in compounds of C and Si is:

Question 4 :
What is the smallest part of the crystal that has the three-dimensional pattern of the whole lattice called?

Question 6 :
Which of the following compounds would be a white, crystalline solid?

Question 11 :
Compounds with identical crystal structure and analogous chemical formula are called:

Question 12 :
$I$. Metallic solids tend to be very brittle.$II$. Metallic bonds are broken quite easily.

Question 19 :
Statement: Diamond glitters because of its high refractive index.<br/><br/>State whether the given statement is true or false

Question 21 :
Examples of few solids are given below. Find out the example which is not correctly matched.

Question 24 :
Which of the following is an examples of covalent crystal solid?

Question 25 :
Which of the following exists as covalent crystals in the solid state?<br/>

Question 30 :
Statement: Covalent solids are good conductor of electricity.<br/>State whether the given statement is true or false

Question 31 :
Solid $X$ is a very hard solid which is electrical insulator in solid as well as in molten state and has extremely high melting point. What type of solid is it?

Question 38 :
The thermal conductivity of silver and copper is high because they have following binding :<br/>

Question 39 :
Which of the following is an example of metallic crystal solid?

Question 41 :
Some of the following properties are important in determining whether an element has metallic properties.<br/>I : atomic number<br/>II : atomic weight<br/>III: number of valence electrons<br/>IV: number of vacant atomic orbitals<br/>V: total number of electronic shells in the atom<br/>Select correct properties from the codes given below:

Question 42 :
Which of the solids show the following properties?<br>(i) Electrical conductivity<br>(ii) Malleability<br>(iii) Ductility<br>(iv) Fairly high melting point<br>

Question 43 :
Which type of bonding is responsible for the ability of some solid materials to conduct electricity?

Question 44 :
Statement: The melting point of all substances decreases with pressure increase.<br/><br/>State whether the given statement is true or false.

Question 47 :
Assertion: Crystalline solids can cause X-rays to diffract. Reason: Interatomic distance in crystalline solids is of the order of $0.1$ nm.