Explanation

Gypsum’s chemical formula: CaSO₄·2H₂O.

It is a hydrated form of calcium sulfate, containing water of crystallization.

Explanation

Deaeration removes dissolved gases (mainly oxygen and carbon dioxide) from water.

It prevents corrosion in boilers and pipelines.

Explanation

Natural Gas Liquids (NGLs) are hydrocarbon compounds separated from natural gas.

They include ethane, propane, butane, and pentane.

Explanation

In the contact process, SO₂ is absorbed in concentrated H₂SO₄ to produce oleum (H₂S₂O₇).

This improves the efficiency of SO₂ conversion to H₂SO₄.

Explanation

Fuels are substances that release energy when burned.

This energy is mainly in the form of heat and sometimes light.

Explanation

- Boyle’s Law: P ∝ 1/V (at constant temperature)  

  → When pressure increases, volume decreases, and vice versa.  

- Applies to gases with constant temperature and fixed mass.  

- Used in understanding gas compression, breathing, and syringe function.

Explanation

- Mercury has high cohesion (strong attraction between its own molecules).  

- Mercury has low adhesion with most surfaces (weak attraction to other materials).  

- Due to high cohesion and low adhesion, mercury forms rounded droplets and does not spread out like water.  

- This behavior causes mercury to flow as droplets rather than wetting the surface.  

- Mercury’s surface tension is very high, making it behave differently than most liquids.

Explanation

Freezing point of mercury is -38.83C.

The boiling point of Mercury is 356.7 °C.

Mercury is a chemical element

It is commonly known as quicksilver. 

It is the only metal to remain in liquid form at room temperature.

Droplets of liquid mercury are shiny and silver-white with a high surface tension, appearing rounded when on flat surfaces

Explanation

Mercury is a chemical element

It is commonly known as quicksilver. 

It is the only metal to remain in liquid form at room temperature.

Droplets of liquid mercury are shiny and silver-white with a high surface tension, appearing rounded when on flat surfaces

Explanation

NaCl is a classic example of an ionic compound

Where sodium (Na) loses an electron to become a positively charged ion (cation),

And chlorine (Cl) gains an electron to become a negatively charged ion (an anion).

Formula: NaCl

Molar mass: 58.44 g/mol

IUPAC ID: Sodium chloride

Melting point: 801 °C

Soluble in: Water, Ammonia, Ethanol, Glycerol, Methanol, Propylene glycol, Formic acid, Formamide

Classification: Salt

Boiling point: 1,465 °C