Chemistry Chapter 11 Entry Test MCQs
26. _ ion has the largest radius.
a. F-1
b. Al+3
c. O-2
d. Cl-1
27. The hydronium ion is a/an _
a. Ion with the formula H3O+
b. Ion with formula H2O+
c. Ion formed by removal of H– form a water molecule.
d. Free radical rather than an ion
28. The ionization energy of nitrogen is more than oxygen because of _
a. More penetration effect
b. More attraction of electrons by the nucleus
c. The size of nitrogen atom is smaller.
d. The extra stability of half filled p – orbital
29. Electrical conductance of an element does not depend upon:
a. No of free electron
b. Temperature
c. No. of inner electrons
d. Ease of mobility of electrons
30. What type of oxides are formed by K when excess oxygen is supplied?
a. Super oxide
b. Normal oxide
c. Amphoteric oxide
d. Peroxide
31. What is the Common Characteristic of Elements having 86, 54, 36, 18, and 10 Atomic Numbers?
a. Light metals.
b. Inert gasses.
c. Halogens.
d. Rare earth.
32. Which of the Following Cations has the Smallest Radius?
a. Be2+
b. Na+
c. Ba+2
d. Li+
33. The lowest electron affinity is possessed by:
a. Ba
b. Li
c. Ca
d. Be
34. Which Group of Elements Can Form Anions Most Quickly?
a. Alkali metals.
b. Halogens
c. Nitrogen family
d. Oxygen family
35. The Diagonal Relationship can be Observed by
a. Elements of 1st period.
b. Elements of 3rd period.
c. Elements of 2nd period.
d. Both a and c.
36. If we go from Li to F in the second period, there would be a decrease in
a. Atomic radii
b. Atomic mass
c. Electronegativity
d. Ionization energy
37. What Happens to the Metallic Character of Elements When we Move from Left to Right of the Periodic Table?
a. Increase
b. Decrease
c. Remains constant
d. Initially increases and after that decreases
38. The formation of O2− (g) starting from O(g) is endothermic by 603 kJ mol−1 . If electron affinity of O (g) is −141 kJ mol−1 , the second electron affinity of oxygen would be:
a. + 462 kJ mol−1
b. + 744 kJ mol−1
c. – 462 kJ mol−1
d. – 744 kJ mol−1
39. The correct order of first ionization potential is
a. He > O > F > N > Mg
b. F > He > Mg > N > O
c. N > F > He > O > Mg.
d. He > F > N > O > Mg
40. The correct sequence of the ionic radii of the following is:
a. I− > Cl− > S2− > O2− > F−
b. I− > S2− > Cl− > O2− > F−
c. I− > S2− > Cl− > F− > O2−
d. S2− > I− > O2− > Cl− > F−
41. The ions O2−, F−, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show
a. a significant increase from O2− to Al3+
b. an increase from O2− to F− and then decrease from Na+ to Al3+
c. a significant decrease from O2− to Al3+
d. an decrease from O2− to F− and then increase from Na+ to Al3+
41. The ions O2−, F−, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show
a. a significant increase from O2− to Al3+
b. an increase from O2− to F− and then decrease from Na+ to Al3+
c. a significant decrease from O2− to Al3+
d. an decrease from O2− to F− and then increase from Na+ to Al3+
42. Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?
a. F < Cl < O < S
b. S < O < Cl < F
c. O < S < F < Cl
d. Cl < F < S < O
43. A sudden large jump between the values of second and third ionization energies of elements would be associated with which of the following electronic configuration?
a. 1s2 2s2 2p6 3s2 3p2
b. 1s2 2s2 2p6 3s2 3p1
c. 1s2 2s2 26 3s2
d. 1s2 2s2 2p6 3s4
44. Correct order of (IE) among the elements Be, B, C, N, O is
a. Be < B < C < N < O
b. B < Be < C < O < N
c. Be < B < O < N < C
d. B < Be < C < N < O
45. Which of the following order is wrong?
a. Li < Be < B < C — (IE)1
b. NH3 < PH3 < AsH3 — acidic
c. Li+ < Na+ < K+ < Cs+ — ionic radius
d. Al2O3 > MgO < Na2 O < K2O — Basic
46. Amongst the following elements (whose electronic configurations are given), the one having the highest ionization energy is
a. [Ar] 3d10 4s2 4p3
b. [Ne] 3s2 3p1
c. D) [Ne] 3s2 3p2
d. [Ne] 3s2 3p3
47. The outermost electronic configuration of the most electronegative element is
a. ns2 np5
b. ns2 np3
c. ns2 np6
d. ns2 np4
48. Which of these is the most basic oxide?
a. SnO2
b. FeO
c. K2O
d. CuO
49. The first ionization potential of Na, Mg, Al and Si are in the order
a. Na < Mg < Al < Si
b. Na > Mg > Al < Si
c. Na < Mg > Al < Si
d. Na > Mg > Al > Si
50. The electronegativity of the following elements increase in the order
a. P, Si, N, C
b. Si, P, C, N
c. C, N, Si, P
d. N, Si, C, P