Propene is an alkene, characterized by a carbon-carbon double bond.

Butyne is an alkyne, characterized by a triple bond between carbon atoms.

Physisorption involves weak Van der Waals forces, and the adsorption of water on silica gel is a classic example of this type of adsorption.

Not all p-block elements are metals; many are nonmetals and metalloids.

Transition metals generally have high density, not low density.

The conjugate of a complex number a + bi is a - bi. Thus, the conjugate of 2 - 3i is 2 + 3i.

The conjugate of a complex number a + bi is a - bi. Thus, the conjugate of 5 - 3i is 5 + 3i.

Acceleration is defined as the change in velocity per unit time, so its dimensional formula is [M^0 L^1 T^-2].

Energy has the dimensional formula [M^1 L^2 T^-2], as it is defined as work done, which is force times distance.

Frequency has the dimensional formula [M^0 L^0 T^-1].

Aldehydes contain the functional group -CHO, which is characterized by a carbonyl group (C=O) bonded to a hydrogen atom.

P2O5 is the most acidic oxide among the given options, as it forms phosphoric acid in water.

Formic acid (HCOOH) is the strongest carboxylic acid among the given options due to the presence of a hydrogen atom directly attached to the carbonyl carbon, which increases its acidity.

The unit of pressure is Pascal (Pa), which is equivalent to N/m².

The law of conservation of energy states that energy cannot be created or destroyed, but it can be transformed from one form to another.

CN- is a strong field ligand that causes a large splitting of d-orbitals, leading to low-spin complexes.

The slope of the given line is 3. The slope of a line perpendicular to it is -1/3.

Iron is a ferromagnetic material, which means it can be magnetized and has a high magnetic permeability.

Iron is considered a ferromagnetic material, which can be magnetized and retains its magnetism.

Dialysis is used to purify colloidal solutions by allowing the solvent and small solutes to pass through a semi-permeable membrane while retaining the colloidal particles.

Electrophoresis is used to stabilize colloidal solutions by applying an electric field to separate charged particles.

Water (H2O) has a polar covalent bond due to the difference in electronegativity between hydrogen and oxygen.

Water (H2O) has a polar covalent bond due to the difference in electronegativity between hydrogen and oxygen.

Neodymium (Nd) and Plutonium (Pu) are both f-block elements.

Lanthanum (La) and Cerium (Ce) are both f-block elements, belonging to the lanthanide series.

The mass of an electron is significantly less than that of protons and neutrons.

The electron has the least mass compared to protons and neutrons.

Substituting (0, -4) into the equation gives 4(0) - 5(-4) + 20 = 0, which is true.

Condensation is the process where gas changes to liquid.

Free expansion is an irreversible process as it occurs without any external pressure acting on the gas.