A compound, C10H14, shows an IR peak at 825 cm-1. Its 1H NMR spectrum has peaks at delta 7.0 (4 H, broad singlet), 2.85 (1 H, septet, J=8 Hz), 2.28 (3 H, singlet), and 1.20 (6 H, doublet, J=8 Hz). Draw its structure in the window below.

The structure is that of p-Cymene as shown attached.

Explanation:

To solve the question, we note that at an IR peak at 825 cm⁻¹ we have either a tri-substituted alkenes or a para-di-substituted benzene.

The ¹H NMR spectrum peaks are at delta 7.0 which corresponds to an aromatic and with the 4 H broad singlet indicating that they are sharing two protons while being adjacent to a carbon with no protons. The peak at 2.85 with 1 H septet indicates methyl group with one proton attached to two equivalent alkyl groups with 3 protons each. The peak at 2.28 with three proton is equivalent to a methyl group attached to the aromatic ring while the peak at 1.2 with 6 protons are the 2 equivalent methly groups attached to a carbon with only one proton.

The structure is attached.

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

increased stability in the completion of fluorine's outer shell.