What do you understand by a lone pair of electrons?

The pair of electrons that are left in the valence shell without forming covalent bonds are known as lone pairs of electrons. They affect the shape of the molecule and sometimes help in the formation of other molecules.

E M B I B E

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 10

EASY

10th ICSE

IMPORTANT

Earn 100

Explain the following:

Water is a polar covalent molecule?

Important Questions on Chemical Bonding

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 11

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one forms an anion?

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 11

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one forms a cation?

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 11

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. State type of bond between Y and Z and give its molecular formula.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 12

Taking

{MgCI}_{2}

as an electrovalent compound,

{CCI}_{4}

as a covalent compound, give any four differences between electrovalent and covalent compounds.

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 13

Potassium chloride is an electrovalent compound, while hydrogen chloride is a covalent compound. But, both conducts electricity in their aqueous solutions. Explain.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 14

Draw the electron dot structure of covalent compound methane (non-polar) and HCI (polar) and give two differences between them.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 14

Name two compounds that are covalent when taken pure but produce ions when dissolved in water.

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 2 - Chemical Bonding>Intext Questions>Q 14

Name two compounds that are covalent when taken pure but produce ions when dissolved in water. For each compound mentioned above give the formulae of ions formed in aqueous solution.