Alkali and alkaline earth metals form____________ compound when they react with nonmetals

(a)

ionic

(b)

covalent

(c)

co-ordinate covalent

(d)

all the above

___________compounds are highly brittle

(a)

Ionic

(b)

Covalent

(c)

Co-ordinate covalent

(d)

Covalent

_______________is an example of a covalent compound having high melting point

(a)

Magnesium oxide

(b)

Silicon carbide

(c)

Ammonia

(d)

All the above

Which of the following compound(s) possesses high melting point?

(a)

NaCI

(b)

MgCI₂

(c)

CCl₄

(d)

Both a & b

Statement (A) : Covalent compounds are bad conductor of electricity.
Reason (B) Covalent compounds contain charged particles (ions)

(a)

B explains A

(b)

B does not explain A

(c)

Both A & B are right

(d)

Both A & B are wrong

What is chemical bond?

Write the basic concept of Kossel - Lewis theory

What is covalent bond?

What are redox reactions? Give examples

Ionic bond is also called electrostatic bond.

Identify the incorrect statement and correct them.
a. Like covalent compounds, Coordinate compounds also contain charged particles (ions), so they are good conductors of electricity.
b. Ionic bond is a weak bond when compared to Hydrogen bond.
c. Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms.
d. Loss of electrons is called Oxidation and Gain of electron is called Reduction.
e.The electrons which are not involved in bonding are called valence electrons.

Discuss in brief about the properties of Coordinate covalent compounds.