Explanation

Plaster of Paris changes into gypsum on mixing with water 

It is commonly called P.O.P. is calcium sulfate hemihydrate.

The chemical formula of plaster of Paris  is CaSO4.1/2 H2O

Crystals of gypsum are produced when Plaster of Paris is mixed with water 

Gypsum is calcium sulfate dihydrate and a mineral used in cement manufacturing.

It helps in controlling the rate of hardening of the cement. 

Explanation

Tea contains water, tea extract, sugar, and milk, mixed physically.

Its components can be separated, so it is a mixture.

Explanation

Explanation

CNG stands for Compressed Natural Gas

Methane is the main component of CNG 

the modern use of CNG as a fuel source began in the 1930s,

American physicist Dr. J.P. Farley discovered that natural gas could be compressed to a high-pressure 

natural gas became a transport fuel during the First World War

Explanation

Sodium chloride (NaCl), commonly known as table salt.

It is the main salt dissolved in seawater.

Explanation

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.

Explanation

• Distillation is a process that involves boiling the seawater and then collecting the condensed steam, which is free from salt and other impurities, resulting in fresh drinking water.
• This process is commonly used in desalination plants to produce drinking water from seawater.

Explanation

• Sublimation is the transition of a substance from the solid to the gas phase without going through the liquid phase.
• Glucose and Sodium Chloride do not sublime, as they require a liquid phase transition before turning into a gas.

Here are the some solid sublime material:

• Iodine
• Camphor or Dry ice

Explanation

• Crystallization is the process of separating a soluble solid from a solution by allowing the solution to cool and form crystals.
• This process is used to purify substances and obtain a solid in a pure form.

Explanation

• Solar power is a renewable energy source that generates electricity from sunlight.
• It does not emit carbon dioxide (CO2) or any other greenhouse gases.

The sources of carbon dioxide emissions:

• Burning of fossil fuels (such as coal, oil, and natural gas) releases CO2 into the atmosphere.
• Burning wood (such as in fireplaces or woodstoves) also releases CO2.
• Respiration (the process by which living organisms breathe) releases CO2 as a byproduct.
• Car exhaust smoke (from internal combustion engines) contains CO2, as well as other pollutants.