WorksheetsChem1A Exam Buster Part 2
Total questions: 15
Worksheet time: 16mins
1. What is the concentration of the solution obtained by diluting 50 mL solution of 0.25 M HCl to 250 mL?
0.1M
0.125M
0.05M
5M
What is the oxidation number of fluorine in CaF2?
+1
-2
+2
-1
Which element has the largest atomic radius?
Fr
Cs
Mg
Be
Which of the following quantum numbers is impossible?
n = 2, l = 1, m = -1, s = ½
n = 3, l = 2, m = 2, s = - ½
n = 1, l = 0, m = -2, s = ½
n = 2, l = 0, m = 0, s = - ½
Which element has the smallest Effective Nuclear Charge, Zeff?
Ca
Na
H
Mg
How many moles of Na2SO4 are present in 200mL of a 0.1M solution?
0.05 mol
0.5 mol
0.02 mol
0.2 mol
Which of the following does not represent a redox reaction?
2Al(s) + 3H2SO4(aq) → Al2(SO4)(aq) + 3H2(g)
2H2O(g) → 2H2(g) + 3O2(g)
2NH3(g) à N2(g) + 3H2(g)
None of the above, they are all redox reactions
Which of the following is incorrect in terms of electronegativity?
F has a lesser electronegativity than oxygen
Ra has a lesser electronegativity than bromine
H has a lesser electronegativity than nitrogen
C has a lesser electronegativity than chlorine
What is the ground state electron configuration for C?
[He] 2s22p4
[He] 2s23s24s2
[He] 2s22p2
[He] 2p4
Which is the correct Lewis structure?
A
B
C
D
Which ion has the smallest ionic radius?
O2-
Li+
K+
F-
Which element exhibits the most metallic character?
Fe
Fr
Ca
Au
Which pairs do not have the same electron configuration?
O2-, Na+
P3-, Ca2+
Li+, He
S2-, Ne
Which of the following statements is incorrect?
Magnesium is more reactive than lead
Silver is more reactive than copper
Iron is more reactive than nickel
Hydrogen is more reactive than gold
What are all the possible m values for an l value of 2?
-1, 4, 1, 2, 3, -2
2, -1, 0, 1, -2,
0, 1, 2
None of the above
