Extraction Of Salt

The video tutorial explains sodium chloride's properties and its extraction methods: evaporation of seawater, salt mining, and solution mining. It highlights the industrial processes involved, such as iodization, and discusses the environmental impact of solution mining, including subsidence. The tutorial emphasizes the importance of considering environmental consequences in large-scale salt extraction.

What is the structure of sodium chloride?

• A molecular lattice

• A giant 3D ionic lattice

• A covalent network

• A metallic lattice

Which method is used to extract salt in hotter climates?

• Mining rock salt

• Solution mining

• Using salt pans

• Boiling seawater indoors

Why is iodization an important step in refining salt?

• To make it more soluble

• To increase shelf life

• To enhance the taste

• To prevent goiter

What is a common use of rock salt obtained from mining?

• Table salt

• Animal feed

• De-icing roads

• Water softening

How does the mixture of sodium chloride and calcium chloride help in colder climates?

• By absorbing moisture

• By making roads slippery

• By lowering the freezing point of water

• By increasing the freezing point of water

What is a significant drawback of solution mining?

• It creates large underground caves

• It is more expensive

• It requires more labor

• It produces less pure salt

What is the term for the collapse of the Earth's surface due to solution mining?

• Erosion

• Landslide

• Subsidence

• Avalanche