Question

a covalent compound with a high polarity will likely...
form a precipitate in water.
form a homogeneous mixture with water.
be electrically reactive in water.
form a heterogeneous mixture with water.
12 multiple choice 1 point
the deciding factor for polarity is the...
mass of an atom.
electronegativity of an atom.
size of an atom.
shape of the atom.
13 multiple choice 1 point
a solution forms when a __ dissolves in a __.
molecule; compound
liquid; gas
solvent; solute
solute; solvent

Explanation:

Question 1 (Top Question about Covalent Compound with High Polarity)

A covalent compound with high polarity has a significant dipole moment. Water is polar, and "like dissolves like" (polar substances dissolve in polar solvents). A homogeneous mixture (solution) forms when a polar solute dissolves in polar water. Precipitation is for insoluble ionic compounds, electrical reactivity relates to electrolytes (not just polarity), and heterogeneous mixtures form with non - miscible substances. So the correct option is the one about forming a homogeneous mixture with water.

Polarity in a bond or molecule is determined by the difference in electronegativity between atoms. Electronegativity is the ability of an atom to attract electrons. Atomic mass, size, or shape do not directly determine polarity. So the deciding factor is electronegativity.

A solution is a homogeneous mixture where a solute (the substance being dissolved) dissolves in a solvent (the dissolving medium). Molecule/compound is incorrect terminology for this, liquid/gas is not the standard definition, and solvent/solute is reversed. So the correct pair is solute and solvent.

Answer:

B. form a homogeneous mixture with water (assuming the options are labeled A, B, C, D with B being this option)

Question 12 (Deciding Factor for Polarity)