SAT Subject Test Chemistry,10 edition

45 .

The reverse reaction    for the one shown   above   is  exothermic. If  the temperature is

lowered,    what    will    occur?

(A) The pH  will    decrease.

(B) The equilibrium will    shift   to  the right.

(C) The concentration   of  H 3 O+  ions    will    increase.

(D) The equilibrium will    shift   to  the left.

(E) Temperature does    not affect  equilibrium.

46 . Which of the following reactions shows a decrease in entropy?

(A) C   (s) +   2H 2    (g) →   CH 4    (g)

(B) H 2 O   (g) → H 2   (g) +   1/2O 2  (g)

(C) 2NI 3   (s) → N 2   (g) +3I 2   (g)

(D) 2O 3    (g) → 3O 2  (g)

(E) None    of  the above

47 . Which of the following is an incorrect association?

(A) Mendelev–periodic   table

(B) Faraday–electrolytic    cells

(C) Millikan–charge of  electrons

(D) Rutherford–photoelectric    effect

(E) They    are all correct.

48 . Which of the following is true of an electrolytic cell?