Explanation

 The functional group present in aldehydes is the aldehyde group, which is represented as -CHO.

This group consists of a carbonyl group (C=O) where the carbon atom is bonded to at least one hydrogen atom. 

Explanation

Carbon monoxide has a much higher affinity for hemoglobin than oxygen,

Meaning it binds to the hemoglobin molecule more readily,

Effectively prevents oxygen from binding and reduces the blood's ability to carry oxygen. 

Explanation

 Ferromagnetic materials are those that can retain a permanent magnetization even after an external magnetic field is removed.

This property is due to the aligned magnetic domains within the material.

Iron (Fe), Cobalt (Co), and Nickel (Ni) are all ferromagnetic.

Antimony (Sb), on the other hand, is not ferromagnetic; it is classified as diamagnetic, meaning it repels a magnetic field. 

Explanation

Molten NaCl conducts electricity because of the presence of free ions. 

When sodium chloride (NaCl) melts, the ionic bonds holding the sodium (Na+) and chloride (Cl-) ions together break, allowing them to move freely within the liquid.

These mobile ions can carry electrical charge, thus enabling the molten salt to conduct electricity. 

Explanation

Methane (CH₄) is a stable greenhouse gas with a relatively long atmospheric lifetime.

Its mean residence time in the atmosphere is approximately 3 to 7 years before it reacts or breaks down.

Explanation

The composition of dry air is:

1. Nitrogen (N2) - approximately 78.08% by volume
2. Oxygen (O2) - approximately 20.95% (21%) by volume
3. Argon (Ar) - approximately 0.93% by volume
4. Carbon Dioxide (CO2) - approximately 0.04% by volume (varies with location and time)

Explanation

• Ionic crystals are typically characterized by high melting points due to the strong electrostatic forces between the positively and negatively charged ions.
• The attractive forces between oppositely charged ions are strong, requiring a significant amount of energy to overcome, resulting in high melting points.

Explanation

Potassium dichromate acts as a strong oxidizing agent. 

Potassium dichromate is a powerful oxidizing agent, meaning it readily accepts electrons from other substances, causing them to be oxidized.

This characteristic is widely utilized in various chemical reactions and industrial processes where it's employed to oxidize other substances, particularly in acidic media

Explanation

 An aromatic alcohol is an alcohol where the hydroxyl group (-OH) is attached to a carbon atom that is part of an aromatic ring (like benzene).

Benzyl alcohol has the chemical formula C6H5CH2OH,

Indicating that the -OH group is attached to a carbon atom that is part of a benzene ring. 

Explanation

Cl-CH₂-COOH (chloroacetic acid) is the strongest because the electronegative chlorine atom withdraws electrons, increasing acidity.

This stabilizes the conjugate base, making it a stronger acid than formic acid (HCOOH) or acetic acid (CH₃COOH).