An even function satisfies f(x) = f(-x). f(x) = x^2 is even.

The –F group is an example of a -I effect as it withdraws electron density through sigma bonds.

All halogens (-F, -Cl, -Br, -I) exhibit -I effect, but -F is the strongest among them.

The –NO2 group withdraws electron density through resonance, exhibiting a -M effect.

Baking a cake is a chemical change as it results in the formation of new substances.

Acetaldehyde can exist in two forms (keto and enol) that readily interconvert, demonstrating tautomeric isomerism.

Nylon-6,6 is a copolymer made from two different monomers: hexamethylenediamine and adipic acid.

Sugar is an example of a crystalline solid, characterized by a well-ordered structure.

In the reaction 2H2O2 → 2H2O + O2, hydrogen peroxide is both oxidized and reduced.

BF3 is a Lewis acid as it can accept a pair of electrons.

Magnetic force is an example of a non-contact force, as it acts at a distance.

Cornstarch in water (oobleck) is a non-Newtonian fluid that exhibits varying viscosity depending on the shear rate.

The adsorption of O2 on activated charcoal is an example of physical adsorption.

Dissolving sugar in water is a physical change as it does not alter the chemical composition.

Sodium lauryl sulfate is a synthetic detergent commonly used in personal care products.

Polyvinyl chloride (PVC) is a synthetic polymer widely used in construction and plumbing.

An adiabatic process is one in which no heat is exchanged with the surroundings. Compressing a gas in a piston without heat exchange is an example.

Penicillin is a well-known antibiotic used to treat bacterial infections.

Photosynthesis is an endothermic process as it absorbs energy from sunlight.

Pentane and 2-methylbutane differ in the arrangement of carbon atoms, thus showing chain isomerism.

2-pentene can exist in cis and trans forms due to the presence of a double bond.

Heating a metal rod is an example of conduction, where heat is transferred through direct contact between particles.

Boiling water in a pot is a classic example of convection, where hot water rises and cooler water descends.

Heat transfer in a pot of boiling water is an example of forced convection.

Sunlight warming the Earth is an example of heat transfer by radiation, as it does not require a medium.

Lactic acid has a chiral center and can exist as two enantiomers, thus exhibiting optical isomerism.

Physisorption involves weak van der Waals forces, and the adsorption of oxygen on activated charcoal is a classic example.

1-bromopropane and 2-bromopropane differ in the position of the bromine atom, showing structural isomerism.

Keto-enol tautomerism is a classic example of tautomeric isomerism.

Volume is an extensive property, as it depends on the amount of substance present.