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ACS Gen Chem Practice Exam 2024/2025 Questions With Completed & Verified Solutions.
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ACS Gen Chem Practice Exam 2024/2025 Questions With Completed & Verified Solutions.
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ACS Gen Chem Practice ExamWhich is the strongest oxidizing agent?
N a →← N a + + e - 2 . 7 1 V
Cd →← Cd2+ + 2e- 0.40 V
H2 →← 2H+ +2e- 0.00V
Ag→← Ag++e- -0.80V
(A) Na+
(B)H2
(C) Cd0
(D)Ag+ - ANS Ag+
All are examples of Lewis acid-base reactions except
Cu2+(aq) + 4NH3(aq) →← [Cu(NH3)4]2+(aq)
HCl(g) + NH3(g) → NH4Cl(s)
H+(aq) + OH-(aq) →← H2O(l)
2Na(s) + Cl2(g) → 2NaCl(s) - ANS 2Na + Cl2 -> 2NaCl(s)
According to the Lewis definition, an acid is a species - ANS accepting a pair of electrons
All are potential Lewis bases except
NH3
H2O
CH4
CN- - ANS CH4
Which hydrated metal ion is most acidic under conditions of equal molar concentration in water?
- ANS Al3+
Which element in Group 5A forms the most basic oxide? - ANS Bi
In what respect does an atom of magnesium differ from a magnesium ion (Mg^2+) - ANS The
ion has more stable electronic arrangement than the atom
A certain atom has the symbol 148/73Px. What does the symbol tell about an atom of the
element? - ANS It has 75 neutrons in the nucleus
The atomic mass of an element is 32.07 u and its atomic number is 16. The number of protons
contained in the nucleus of an atom of this element is - ANS 16
The atomic mass of an element is 32.07 u and its atomic number is 16. The element forms a
simple ion. The ion will most likely have a charge of - ANS 2-
, Which atom contains 7 neutrons
A. n=1 n=2 n=3
M=24,z=12 2e 8e 2e
B. n=1 n=2 n=3
M=15 z=7 2e 5e
C. n=1 n=2 n=3
M=17, z=10 2e 8e
D. n=1 n=2 n=3
M=34, z=17 2e 8e 7e - ANS C
In which pair of compounds should the first member be more covalent than the second
member?
A TlCl, TlCl3
B SnI4,SnF4
C LiF, BF3
D SnF4, CF4 - ANS SnI4, SnF4
Which is the most complete and best description of a covalent bond? - ANS a system of nuclei
where each atom donates one electron to the other atom, thus forming a bond
Which pair of elements is most likely to react to form a covalently bonded species?
A P and O
B Ca and O
C K and S
D Zn and C - ANS P and O
Which chloride should exhibit the most covalent type of bond?
NaCl
KCl
CaCl2
BaCl2
BeCl2 - ANS BeCl2
Which two elements are most likely to involve covalent bonding?
Q 0.9
R 1.0
T 2.8
X 3.0
Z 4.0 - ANS T and X
Chromium metal can be plated from an acidic solution of CrO3.
How many grams of chromium will be plated by the passage of 19,300 C - ANS 1.73g
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