Chemistry 1A Quiz Buster 2 T1 2021

Which of the following compounds is insoluble?

• NaNO₃

• AgCl

• _­Pb(NO₃)₂

• (NH₄)₂CO₃

What is the oxidation number of sulphur in MgSO₄?

• +7

• +6

• -7

• -6

Which element has the largest atomic radius?

• F

• Sr

• Mg

• Be

What is the molarity of a solution obtained by diluting a 25.0mL solution of 0.50M H₂SO₄ to 500mL?

• 0.05M

• 0.025M

• 0.25M

• 2.5M

Which of the following quantum numbers is impossible?

• n = 2, l = 2, m = 0, s = - ½

• n = 1, l = 0, m = 0, s = ½

• n = 3, l = 2, m = -2, s = ½

• n = 2, l = 1, m = 1, s = - ½

Which element has the smallest Z_eff­?

• Ca

• Li

• Br

• Ge

When balancing redox half equations, we balance ____ after balancing oxygens

• Hydrogens

• Non-hydrogen and non-oxygen atoms

• Charges by removing electrons

• None of the above

Which of the following is true regarding electronegativity?

• F is less electronegative than oxygen

• Cl is more electronegative than bromine

• H is more electronegative than nitrogen

• C is more electronegative than chlorine

Which of the following does not represent a redox reaction?

• 2H₂O_(g) -> 2H_2(g) + 3O_2(g)

• 2HCl_(aq) + Pb(NO₃)_2(aq) à 2HNO_3(aq) + PbCl_2(s)

• 2Al_(s) + 3H₂SO_4(aq) à Al₂(SO₄)_(aq) + 3H_2(g)

• None of the above, they are all redox reactions.

Based on the activity series of metals, which reaction below will NOT occur?

• 2Au_(s) + 2HNO_3(aq)

• Na_(s) + 2CuCl_2(aq)

• Ba_(s) + 2AgNO_3(aq)

• All of the above reactions will occur