Carbon Class 8 Quiz

What is the atomic structure of carbon?

• 6 protons, 6 neutrons, and 5 electrons

• 6 protons, 7 neutrons, and 6 electrons

• 6 protons, 6 neutrons, and 6 electrons

• 5 protons, 6 neutrons, and 6 electrons

How many valence electrons does carbon have?

• 2

• 6

• 4

• 8

Explain the bonding in a carbon atom.

• Covalent bonding by sharing electrons

• Metallic bonding by sharing electrons in a lattice structure

• Hydrogen bonding by sharing protons

• Ionic bonding by transferring electrons

What are the two main allotropes of carbon?

• Oxygen and Nitrogen

• Coal and Charcoal

• Steel and Iron

• Diamond and Graphite

Describe the properties of diamond and graphite.

• Diamond is transparent and black, while graphite is hard and soft.

• Diamond is soft and transparent, while graphite is hard and black.

• Diamond is hard and transparent, while graphite is soft and black.

• Diamond is soft and black, while graphite is hard and transparent.

What is the color of carbon monoxide?

• Colorless

• Red

• Blue

• Green

What is the odor of carbon monoxide?

• Odorless

• Sweet

• Sour

• Bitter

What is the process of preparing carbon dioxide?

• By burning carbon in the presence of oxygen

• By mixing carbon with water

• By heating carbon with hydrogen

• By reacting carbon with nitrogen

How is carbon dioxide used in fire extinguishers?

• It acts as a fuel to extinguish the fire

• It releases oxygen to put out the fire

• It cools down the fire by absorbing heat

• It creates a barrier to prevent the fire from spreading

What are the environmental impacts of carbon dioxide emissions?

• It contributes to global warming and climate change

• It improves air quality and reduces pollution

• It has no impact on the environment

• It depletes the ozone layer