Explanation

In the 3d series of the periodic table, melting and boiling points generally increase up to the middle,

Reaching a peak around elements like Chromium (Cr), and then decreasing towards the end of the series, with Zinc (Zn) having the lowest melting point. 

Explanation

Iodine is solid due to its high polarizability. 

Iodine is a solid at room temperature due to the strong intermolecular forces present between its molecules, specifically London dispersion forces

These forces arise from the large size and high polarizability of iodine atoms.

Larger atoms like iodine have more electrons, which are easier to distort, leading to stronger attractive forces between molecules.

This allows iodine molecules to stick together in a solid state

Explanation

Cobalt (Co) is a typical transition metal with partially filled d-orbitals, a key trait of transition elements.

It shows variable oxidation states and forms colored compounds—classic properties of transition metals.

Explanation

Water is neutral and does not have a taste.

The taste buds on our tongues can detect five basic tastes: sweet, sour, salty, bitter, and umami (savory).

Water does not contain any molecules that stimulate these taste buds, making it tasteless.

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)