Ionic Bond

Q.

What is a reduction reaction? Give an example

Q.

State four differences between electrovalent and covalent compounds.

Q.

How Do You Identify An Ionic Compound?

Q.

Give an example of covalent solid?

Q.

Which halide has the highest melting point ?

1. NaCl

2. NaBr

3. NaF

4. Nal

Q. Which of the following compounds has the highest melting point?

1. $\text{KCl}$
2. ${\text{C}}_3{\text{H}}_7\text{OH}$
3. ${\text{C}}_6{\text{H}}_5\text{COOH}$
4. ${\text{CH}}_4$

Q.

What is the valency of gold?

Q.

The property which is characteristic of an electrovalent compound is that:

1. It is easily vaporised

2. It has a high melting point

3. It is weak electrolyte

4. It often exists as a liquid

Q.

Structural Formula And Electron Dot Structure Of Chlorine.

Q.

An oxidation process involves ___.

1. Gain of electrons

2. Loss of electrons

3. Both gain and loss of electrons

4. Neither gain nor loss of electrons.

Q.

What are the ions present in $\mathrm{NaCl}$?

Q. Ionic compounds are more soluble in polar solvents because

1. water molecules is polar in nature
2. they have high solubility in water
3. ionic crystals can easily break down in polar solvents
4. of strong electrostatic forces of attraction between ions of crystals and polar solvent molecules.

Q.

What is a covalent bond? What type of bond exists in $\left({\mathrm{CaCl}}_2\right)$

Q. H2S gas when passed through a solution of cations containing HCl precipitates the cations of second groupof qualitative analysis but not those belonging to the fourth group. It is because (1) Presence of HCl decreases the sulphide ion concentration (2) Presence of HCl increases the sulphide ion concentration (3) Solubility product of group II sulphides is more than that of group IV sulphides (4) Sulphides of group IV cations are unstable in HCl

Q.

Which of the following compound can form hydrogen bonds?

1. CH₄

2. NaCl

3. CHCl3

4. H₂O

Q. Difference between covalent radius and vander waals radius?

Q.

When a metal atom becomes an ion __.

1. it loses electrons and is oxidized.

2. it gains electrons and is reduced.

3. it gains electrons and is oxidized.

4. it loses electrons and is reduced.

Q.

Why water dissolves many of the substances easily

Q.

The electronic configurations of three elements X, Y, and Z are as follows:
X=2, 4

Y=2, 7

Z=2, 1

(a) Which two elements will combine to form an ionic compound?
(b) Which two elements will react to form a covalent compound?
Give reasons for your choice.

Q.

You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting it? To examine if the fine white coloured powder is sugar or salt we can conduct two experiments.

Q.

How are complex compounds formed?

Q.

Why metals are malleable and ductile ??

Q.

Is NaCl polar or nonpolar a covalent bond?

Q.

What is the difference between valency and oxidation state

Q. what property of metal makes useful as electrical wires explain this property in terms of the atoms involved

Q.

Ionic compounds are __

1. volatile.

2. constitute particles called molecules

3. insoluble in water but dissolve in organic solvents.

4. good conductors of electricity in the fused or aqueous state.

Q.

Is$\mathrm{LiCl}$ covalent or ionic?

Q.

How hydronium ion is formed?

Q.

How are molecules formed?

Q.

What is the name of the chemical bond formed:
(a) by the sharing of electrons between two atoms?
(b) by the transfer of electrons form one atom to another?