Each question in this quiz is timed.
What is the mass of the given sample? The atomic mass of N is 14 amu.
Which of the following properties are characteristic for the "nonmetals?"
I. high electrical conductivity
II. large ionization energy
III. high electronegativity
IV. low electron affinity
I and II
II and III
III and IV
II and IV
I, II, and III
Which of the following is/are true?
I and III
I and IV
Which of the substances above contain covalent bond only?
all of them
I, II, and IV
II, III, and IV
Which of the following atoms are isotopes of each other?
X: 11 protons, 11 electrons, 12 neutrons
Y: 11 protons, 10 electrons, 12 neutrons
V: 11 protons, 11 electrons, 13 neutrons
W: 12 protons, 12 electrons, 12 neutrons
X and Y
X and W
Y and V
V and W
X and V
An aqueous solution is prepared by dissolving 1.6g NaOH in 250 mL final volume. What is the molar concentration of the solution? (*The molar mass of NaOH is 40g/mol.)
Which of the following changes of conditions will shift the equilibrium of the reaction to the right?
I, III, and IV
Which of the compounds above will be produced when two elements, X (atomic number 13) and Y (atomic number 8), react together?
Which of the solutions above is most basic?
Which of the sets above contains only polar molecules?
Which of the following statements are correct descriptions about the calcium atom, "in any reaction where a calcium atom changes to calcium ion?"
I. it loses an electron
II. it becomes an anion
III. it is oxidized
IV. it achieves noble gas electron configuration
What can be the oxidation number of Cr in the given compound?
Which of the following has the greatest first ionization energy?
alkaline earth metals
Aqueous solutions of the five compounds above have the same molar concentration. Which of the above correctly shows "the increasing order of pH among those aqueous solutions?"
How much of solid potassium chloride is required to prepare 200 mL solution with 15% m/m concentration?
(*The density of the solution is 1.2 g/mL.)
Which of the above are the oxidation-reduction reactions?
all of the above
Which of the above is a compound with an ester group?
Which of the pairs above are "structural isomers?"
Which of the above is the main product of the given reaction?
Which of the following statements are correct for the given molecule above in its open chain form?
I. it is an aldopentose
II. it has 4 chiral carbon atoms
III. it is a monosaccharide
IV. it is a D-sugar