TTU Chemistry Placement Practice Exam Questions & Answers (Grade A+).docx

TTU Chemistry Placement Practice
Exam Questions & Answers (Grade
A+)
An oxidation-reduction reaction always-


a.) requires a solvent.
b.) involves a metal
c.) none of the above
d.) releases heat -
correct answer ✅c.) none of the above


Which element is a metalloid (sometimes called a semi-metal)?


a.) Si (atomic number 14)
b.) Al (atomic number 13)
c.) Po (atomic number 84)
d.) H (atomic number 1) -
correct answer ✅a.) Si (atomic number 14)


For the isotope 15N+, the number of protons, neutrons, and
electrons is-

, TTU Chemistry Placement Practice
Exam Questions & Answers (Grade
A+)

a.) 7 protons, 8 neutrons, 6 electrons.
b.) 7 protons, 15 neutrons, 7 electrons.
c.) 7 protons, 8 neutrons, 7 electrons.
d.) 15 protons, 15 neutrons, 14 electrons. -
correct answer ✅a.) 7 protons, 8 neutrons, 6 electrons.


Which species is expected to have the largest polarizability?


a.) Ne
b.) B
c.) F-
d.) Li+ -
correct answer ✅c.) F-


Which species has 38 electrons?


a.) Sr2+
b.) Mo3+