STRAIGHTERLINE CHEMISTRY CORRECT EXAMS QUESTIONS AND ANSWERS SURE A.pdf

STRAIGHTERLINE CHEMISTRY CORRECT EXAMS
QUESTIONS AND ANSWERS SURE A+
✔✔In a nuclear reaction elements are converted to other elements.

Select one:
True
False - ✔✔True

✔✔A nuclear reaction's reaction rate is affected by temperature, pressure, and
catalysts.

Select one:
True
False - ✔✔False

✔✔The correct formula for the dibromobis(oxalato)cobaltate(III) ion is [Co(C2O4)Br2]3+.

Select one:
True
False - ✔✔False

,✔✔The maximum oxidation state of an element in the first transition series never
exceeds its group number.

Select one:
True
False - ✔✔True

✔✔In complexes of transition metals, the maximum coordination number of the metal is
equal to its number of d electrons.

Select one:
True
False - ✔✔False

✔✔The systematic name of the coordination compound K2[Co(H2O)2I4] is potassium
diaquotetraiodocobaltate(II).

Select one:
True
False - ✔✔True

✔✔A complex ion that undergoes a very slow exchange reaction is called an inert
complex.

Select one:
True
False - ✔✔True

✔✔What is the vapor pressure above a beaker containing a solution of NaCl that is
made up of 250ml of water and 12g of NaCl?

a. 10.3 mmHg
b. 23.4 mmHg
c. 35.8 mmHg
d. 63.2 mmHg - ✔✔b. 23.4 mmHg

✔✔Plants use up copious amounts of which alkali metal, preventing most of it from
being washed out to sea?

a. lithium
b. sodium
c. potassium
d. rubidium - ✔✔c. potassium

, ✔✔Which of the following isotopes is likely to be the most stable?
Select one:
a. F-21
b. Kr-77
c. Po-210
d. Sn-50 - ✔✔d. Sn-50

✔✔Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by
showing that

a. atoms are, in fact, not electrically neutral.
b. the atom contains neutrons.
c. positive matter is concentrated in the central core.
d. electrons are actually greater in mass than protons. - ✔✔c. positive matter is
concentrated in the central core.

✔✔What is the reducing agent in the following equation?
Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2(g)
a. Mg
b. HCl
c. H2
d. MgCl2 - ✔✔A. Mg

✔✔How is the mass number of an element different from its atomic number?

Select one:
a. The mass number represents the total number of protons in one atom of the element
as opposed to the total number of neutrons.
b. The mass number represents the total number of electrons in one atom of the
element as opposed to the total number of protons.
c. The mass number represents the total number of neutrons and protons in one atom
of the element as opposed to the total number of protons.
d. The mass number represents the total number of neutrons and electrons in one atom
of the element as opposed to the total number of neutrons. - ✔✔c. The mass number
represents the total number of neutrons and protons in one atom of the element as
opposed to the total number of protons

✔✔What is Avogadro's number?

Select one:
a. the number of atoms in 12g of Carbon-12
b. the number of moles in 12g of Carbon-12
c. the number of molecules in 12g of Carbon-12
d. the number of periods in 12g of Carbon-12 - ✔✔a. the number of atoms in 12g of
Carbon-12