Explanation

• Carbon Dioxide (CO2) is a greenhouse gas that traps heat in the Earth's atmosphere.
• It contributing to the greenhouse effect and global warming.

Explanation

• Epoxy paints are commonly used to coat industrial equipment, including thermal power station components, due to their excellent adhesion, corrosion resistance, and durability. 
• Epoxy paints form a strong, chemical-resistant film that protects the underlying metal from corrosion and wear.

Explanation

Methylated spirit is 10% methanol and 90% ethanol

The additives which are present in methanol makes it poisonous and dangerous.

This denatured alcohol is made for industrial purposes or non-drinking uses.  Methylated spirit is also used as a fuel for the burners

and it is also used as a solvent.

Explanation

GROUP - 11 (I B) [Copper, Silver and Gold]

Copper, Ag, and Au are known as coinage metals

Because they were used to make coins.

All the metals are noble w.r.t. chemical activity.

Explanation

As we move down Group 17 (halogens), the melting point increases due to greater molecular mass and stronger van der Waals forces.

For example: Fluorine < Chlorine < Bromine < Iodine in melting points.

Explanation

The specific gravity of fat is typically around 0.93 kg/litre at 25°C.

This means that fat is less dense than water, which has a specific gravity of 1.0 kg/litre at the same temperature. 

Explanation

There are 3 main states of matter:

• Solid (fixed shape and volume)
• Liquid (fixed volume, but takes shape of container)
• Gas (neither fixed shape nor fixed volume)

Explanation

Lunar soil is composed mainly of silicate minerals, with silicon dioxide (SiO₂) being a significant component.

Other components include various metal oxides like Fe₂O₃ and MgO, but SiO₂ is prevalent in the overall composition.

Calcium carbonate (CaCO₃) and sodium chloride (NaCl) are not typically found in lunar soil.

Explanation

A) Hydrogen - Very low solubility in water, decreases with increasing temperature.

B) Oxygen - Solubility decreases with increasing temperature; however, it is more soluble than hydrogen.

C) Air - A mixture of gases (mostly nitrogen and oxygen); individual gases like oxygen can dissolve, but overall solubility is affected by temperature.

Correct Answer: B) Oxygen

Oxygen is more soluble in water than hydrogen, and although its solubility decreases with increasing temperature, it remains the most soluble option among those listed.

Explanation