English Medium कक्षा १० - CBSE Question Bank Solutions

What are covalent compounds?

Why covalent compounds are different from ionic compounds?

List three characteristic properties of covalent compounds.

Explain why carbon forms compounds mainly by covalent bond.

Elements forming ionic compounds attain noble gas configuration by either gaining or losing electrons from their outermost shells. Give reason to explain why carbon cannot attain noble gas configuration in this manner to form its compounds.

Name the type of bonds formed in ionic compounds and in the compounds formed by carbon.

Give reason why carbon compounds are generally poor conductors of electricity.

State the reason why carbon can neither form C⁴⁺ cations nor C⁴⁻ anions but forms covalent compounds.

State the reason to explain why covalent compounds "are bad conductors of electricity".

State the reason to explain why covalent compounds "have low melting and boiling points."

Write an equation to show the reaction between plaster of Paris and water.

Plaster of Paris should be stored in a moisture-proof container. Explain why?

What would be the electron dot structure of carbon dioxide which has the formula CO₂?

What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? (Hint – the eight atoms of sulphur are joined together in the form of a ring.)

Ethane, with the molecular formula C₂H₆ has ______.

Butanone is a four-carbon compound with the functional group:

Explain the nature of the covalent bond using the bond formation in CH₃Cl.

 Why are most carbon compounds poor conductors of electricity?

Name a calcium compound which hardens on wetting with water.