Compounds, Molecules, and Bonds

This is an MCQ-based quiz for GRE on the topic of Compounds, Molecules, and Bonds.

Chemical bonds are forces that hold atoms together to make compounds or molecules. Chemical bonds include covalent, polar covalent, and ionic bonds. Atoms with relatively similar electronegativities share electrons between them and are connected by covalent bonds.

Start Quiz

Which of the following molecules is not capable of hydrogen bonding?

Ammonia Methanal Hydrofluoric acid Ethanol

Rank the following compounds in terms by increasing boiling point, starting with the lowest boiling point first. I. 1-pentanol II. n-pentane III. 2,2-dimethylpropane IV. (R)-4-hydroxypentanoic acid.

IV < I < II < III III < II < I < IV III < II < IV < I II < III < I < IV II < III < IV < I

Which molecule experiences only London dispersion forces, and no other intermolecular interactions?

Acetone Ethanol Ammonia Liquid bromine

Which is not a property of covalent compounds?

They contain bonds formed by sharing one or more pairs of valence electrons between atoms They are poor electrical conductors Many are not soluble in water, but are soluble in nonpolar liquids The elements involved generally have large differences in electronegativity They have low melting and boiling points

Which of the following molecules contains polar, covalent bonds? I. KCl II. SO3 III. N2 IV. P2O5 V. CCl4

II, IV, V II, IV I, II, IV, V II, III, IV, V III, IV, V

Which of the following molecules contains the shortest bond between nitrogen and oxygen?

(NO2)-

NH2OH

(NO3)2-

NO+

Which solvent is miscible with water?

CH3OH

CH2Cl2

Pentane

Cyclohexane