5 Steps to a 5 AP Chemistry

Take a Diagnostic Exam  21

29.Choose the reaction expected to have the greatest
increase in entropy.

(A) N 2 (g) +O 2 (g)→ 2 NO(g)

(B) CO 2 (g)→ CO 2 (s)

(C) 2 XeO 3 (s)→ 2 Xe(g) +3 O 2 (g)

(D) 2 K(s) +F 2 (g)→ 2 KF(s)

(E) C(s) +O 2 (g)→ CO 2 (g)

30.A certain reaction is nonspontaneous under stan-
dard conditions, but becomes spontaneous at
lower temperatures. What conclusions may be
drawn under standard conditions?

(A) ΔH>0, ΔS>0 and ΔG> 0

(B) ΔH<0, ΔS<0 and ΔG= 0

(C) ΔH<0, ΔS>0 and ΔG> 0

(D) ΔH<0, ΔS<0 and ΔG> 0

(E) ΔH>0, ΔS<0 and ΔG> 0

Chapter 10

31.Which of the following groups contains only atoms
that are paramagnetic in their ground state?

(A) Be, O, and N

(B) Mg, He, and Rb

(C) K, C, and Fe

(D) Br, Sb, and Kr

(E) S, Zn, and F

The following ground-state electron configurations
are to be used for questions 32–35:

(A) 1s^2 1p^6 2s^2 2p^3

(B) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 d^10 4p^6 5s^2

(C) 1s^2 2s^2 2p^6 3s^2 3p^6 3d^3

(D) 1s^2 2s^2 2p^5

(E) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6

32.This is the configuration of a transition metal ion.

33.This is the configuration of a noble gas.

34.The halogen in this group.

35.This is an impossible electron configuration.

The following answers are to be used for questions
36–39:

(A) Pauli exclusion principle

(B) electron shielding

(C) the wave properties of matter

(D) Heisenberg uncertainty principle

(E) Hund’s rule

36.The exact position of an electron is not known.

37.Nitrogen atoms, in their ground state, are

paramagnetic.

38.An atomic orbital can hold no more than two

electrons.

39.The 4s orbital fills before the 3d.

40.Magnesium reacts with element Xto form an

ionic compound. If the ground-state electron

configuration of Xis 1s^2 2s^2 2p^3 , what is the sim-

plest formula for this compound?

(A) MgX 2

(B) Mg 2 X 3

(C) Mg 3 X 2

(D) MgX

(E) Mg 2 X

Chapter 11

41.VSEPR predicts that an IF 5 molecule will be which

of the following shapes?

(A) tetrahedral

(B) trigonal bipyramidal

(C) square pyramid

(D) trigonal planar

(E) square planar

42.Which of the following does not have one or

more πbonds?

(A) SO 2

(B) SF 6

(C) O 2

(D) SO 3

(E) O 3

43.Which of the following is nonpolar?

(A) IF 5

(B) BrF 3

(C) CF 4

(D) SF 4

(E) OF 2

44.The only substance listed below that contains

ionic,σ, and πbonds is:

(A) Na 3 N

(B) NO 2

(C) NaNO 3

(D) NH 3

(E) HNO 3