Ionic Bond

Q.

(a) Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one :

(i) forms an anion, (ii) forms a cation,

(b) State the type of bond between Y and Z and give its molecular formula.

Q. What do you understand by valency of an element? Is it possible to state the metallic and the non metallic character of an element from their valency?
Can an element show varaible valency. Explain why? [5 MARKS]

Q. Question 29
The reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
(a) Has high melting point.
(b) Has low melting point.
(c) Conducts electricity in molten state.
(d) Occurs as solid.

Q. What is hydride ions?

Q.

What is the valency of dioxide?

Q.

An atom X has 2, 8, 7 electrons in its shell. It combines with Y having 1 electron in its outermost shell.

(a) What type of bond will be formed between X and Y ?

(b) Write the formula of the compound formed.

Q.

Which of the following is true for ionic compounds?

1. They have high boiling and melting points.

2. They are soft, crystalline solids.

3. They conduct electricity in the solid state.

4. They are soluble in organic solvents but insoluble in water.

Q.

In Calcium Nitrate, what is the ionic charge on Nitrate ion?

1. 1-

2. 4-

3. 3-

4. 2-

Q.

State the type of bonding in the following molecules.

(a) water, (b) calcium oxide, (c) hydrogen chloride

Q. The atomic number of two elements A and B are 12 and 8 respectively. What type of a compound is formed when they combine?

1. Ionic compound
2. Covalent compound
3. Coordinate compound
4. No compound is formed

Q.

What are the bonds formed between metals and non-metals?

1. Electrovalent Bond

2. Co-ordinate Bond

3. Covalent Bond

4. All of the above

Q.

Ionic compounds are stable.

1. True

2. False

Q.

Ionic compounds are soluble in ____solvents whereas covalent compounds are soluble in ____.

Q.

Explain how chloride ion is formed?

Q.

What is the nature of bonds present in oxygen molecule?

1. Metallic Bond

2. Polar covalent Bond

3. Non polar Covalent Bond

4. Ionic Bond

Q.

Why do bond angles change?

Q.

Difference Between chemical bond and chemical bonding

Q.

Define electrovalent bond.

Q.

Atoms of ___ elements that have 1, 2 or 3 valence elelctrons can lose electrons to atoms of ___ elements which have 5, 6 or 7 electrons, thereby forming an electrovalent compound.

Q.

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

Q.

What are the conditions necessary for the formation of an electrovalent bond ?

Q. Explain the meaning of hydration and hydrogen bonds and differentia between them

Q.

How do you Identify a Type of Solid?

Q.

Element X has an electronic configuration of (2, 8, 2) and Element Y has an electronic configuration of (2, 6).The compound formed by X and Y is covalent.

1. Ionic compound

2. Covalent compound

Q.

When does the bond formation between two atoms occur?

Q.

Which is the most preferred metal in laboratory for preparation of hydrogen by metal-acid reaction:-

1. Magnesium

2. Sodium

3. Zinc

4. Calcium

Q.

What is the type of chemical bond is present in a calcium fluoride molecule?

1. Covalent bond

2. Ionic bond

3. Co-ordinate bond

4. Hydrogen bond

Q.

Arrange the following compounds in increasing order of $\mathrm{C}—\mathrm{OH}$ bond length: Methanol, Phenol, $\mathrm{p}$-ethoxyphenol

1. Phenol < methanol < $\mathrm{p}$-ethoxyphenol

2. methanol < $\mathrm{p}$-ethoxyphenol < phenol

3. Phenol < $\mathrm{p}$-ethoxyphenol < methanol

4. methanol < phenol < $\mathrm{p}$-ethoxyphenol

Q.

Electrostatic force of attraction occurs between:

1. Ionic Compounds only

2. Covalent compounds only

3. Both ionic and covalent compounds

4. None of these

Q.

Write down the formulae of

(iv) Magnesium hydroxide