40. Select the most acidic compound from the following. A. SO 2 B. Al 2 O 3 C. C
ID: 840499 • Letter: 4
Question
40.
Select the most acidic compound from the following.
A.
SO2
B.
Al2O3
C.
CaO
D.
PbO
E.
H2O
41.
Select the most basic compound from the following.
A.
Bi2O3
B.
SiO2
C.
Cs2O
D.
Na2O
E.
H2O
42.
Which of the following elements will form a cation with a +2 charge?
A.
Si
B.
Sr
C.
Ga
D.
Cs
E.
S
43.
Which of the following ions will be most likely to form when selenium ionizes?
A.
Se6+
B.
Se4+
C.
Se2+
D.
Se2-
E.
Se4-
44.
Which of the following atoms will be diamagnetic?
A.
Cr
B.
Ru
C.
Fe
D.
Pt
E.
Cd
45.
Which of the following elements is paramagnetic?
A.
Kr
B.
Zn
C.
Sr
D.
V
E.
Ar
46.
Select the paramagnetic ion.
A.
Cu+
B.
Ag+
C.
Fe3+
D.
Cd2+
E.
Ca2+
47.
Select the diamagnetic ion.
A.
Cu2+
B.
Ni2+
C.
Cr3+
D.
Sc3+
E.
Cr2+
48.
Consider the set of isoelectronic atoms and ions A2-, B-, C, D+, and E2+. Which arrangement of relative radii is correct?
A.
A2- > B- > C > D+ > E2+
B.
E2+ > D+ > C > B- > A2-
C.
A2- > B- > C < D+ < E2+
D.
A2- < B- < C > D+ > E2+
E.
None of these is correct.
49.
What is the correct order of decreasing size of the following ions?
A.
P3- > Cl- > K+ > Ca2+
B.
Ca2+ > K+ > Cl- > P3-
C.
K+ > Cl- > Ca2+ > P3-
D.
K+ > Cl- > P3- > Ca2+
E.
None of these is correct.
40.
Select the most acidic compound from the following.
Explanation / Answer
40. SO2. (Non-metallic oxides are highly acidic)
41. Cs2O (Metallic oxides are highly basic, Cs being the strongest metal, Cs2O is highly basic)
42. Sr2+
43. Se2-
44. Cd
45. V
46. Fe3+
47. Sc3+
48. (A) (Because as the ratio of proton to electron increases, due to more nuclear attraction, nucleii are bound very closely, thus the ionic radii decreases.)
49. (A) (Same explanation as above)
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