The common features among the species CN-, CO and NO+ are .... [ IIT 2001]
41%
a) Bond order three and isoelectronic
35%
b) Bond order three and weak field ligands
0%
c) Bond order two and π-acceptors
24%
d) Isoelectronic and weak field ligands
Q.2.
The electronic configuration of elements A, B and C are [He]2s1, [Ne]3s1 and [Ar]4s1 respectively. Which one of the following order is correct for IE1 ( in kJ mol-1) of A, B and C? [ EAMCET 2001]
40%
a) A > B > C
30%
b) C > B > A
10%
c) B > C > A
20%
d) C > A > B
Q.3.
The decreasing order of the ionization potential of the following elements is ... [ MP PMT 2001]
0%
a) Ne > Cl > P > S > Al > Mg
56%
b) Ne > Cl > P > S > Mg > Al
33%
c) Ne > Cl > S > P > Mg > Al
11%
d) Ne > Cl > S > P > Al > Mg
Q.4.
Which has smallest size? [ MP CEE 1999] var acc = document.getElementsByClassName("accordion"); var i; for (i = 0; i < acc.length; i++) { acc[i].addEventListener("click", function() { this.classList.toggle("active"); var panel = this.nextElementSibling; if (panel.style.display === "block") { panel.style.display = "none"; } else { panel.style.display = "block"; } }); }
27%
a) Na+
9%
b) Mg2+
18%
c) Al3+
45%
d) P5+
Q.5.
Which one of the following has highest ionization potential? [ EAMCET 1998]
64%
a) Li+
27%
b) Mg+
0%
c) Al+
9%
d) Ne
Q.6.
The elements in which 4f orbitals are progressively filled up are called as ... [ MP CEE 1996]
0%
a) Actinides
0%
b) Transition elements
100%
c) Lanthanides
0%
d) Halogens
Q.7.
Electronic configuration of four neutral atoms is given below. Which of the corresponding element would not be paramagnetic... [ AMU 1997]
36%
a) 1s2, 2s2, 2p6
9%
b) 1s2, 2s2, 2p1
45%
c) 1s2, 2s2, 2p5
9%
d) 1s2, 2s2, 2p4
Q.8.
Highest electron affinity is shown by .. [ DEC 2000]
0%
a) O-
36%
b) F-
55%
c) Cl2
9%
d) F2
Q.9.
Which of the following isoelectronic ions has the lowest ionization energy? [ Haryana CEET 2001]
8%
a) K+
33%
b) Ca2+
17%
c) Cl-
42%
d) S2-
Q.10.
Which of the following sets of atomic numbers belong to that of alkali metal? [ AFMC 2001]
23%
a) 1, 12, 30, 4, 62
46%
b) 37, 19, 3, 55
15%
c) 9, 17, 35, 53
15%
d) 12, 20, 56, 88
Q.11.
Which of the following is most electronegative? [ CPMT 1999 ]
8%
a) Lead
42%
b) Silicon
50%
c) Carbon
0%
d) Tin
Q.12.
The correct order of radii is ... [ IIT 2000 ]
15%
a) N < Be < B
46%
b) F- < O2- < N3-
8%
c) N < Li < K
31%
d) Fe3+ < Fe2+ < Fe4+
Q.13.
Whih of the following does not represent the correct order of the property indicated .. [ CBSE PMT 1997 ]
36%
a) Sc3+ > Cr3+ > Fe3+ > Mn3+ ( ionic radii )
9%
b) Sc < Ti < Cr < Mn ( density )
9%
c) Mn2+ > Ni2+ < Co2+ < Fe2+ ( Ionic radii )
45%
d) FeO < Cao > MnO > CuO ( Basic nature )
Q.14.
Gradual addition of electronic shells in the noble gases causes a decrease in their .. [ MP CEE 1998]
44%
a) Ionization energy
33%
b) Atomic radius
11%
c) Boiling point
11%
d) Density
Q.15.
Which of the following is not a transition metal? .. [ Chd.CET 2000]
10%
a) Zr
40%
b) TC
10%
c) Re
40%
d) Np
Q.16.
The set representing the correct order of first ionization potential is ... [ IIT 2001]
17%
a) K > Na > Li
42%
b) Be > Mg > Ca
25%
c) B > C > N
17%
d) Ge > Si > C
Q.17.
The incorrect statement among the following is : ... [ IIT 1997]
43%
a) The first ionization potential of Al is less than the first ionization potential of Mg
43%
b) The second ionization potential of Mg is greater than the second ionization potential of Na
14%
c) The first ionization potential of Na is less than the first ionization potential of Mg
0%
d) The third ionization potential of Mg is greater than the third ionization potential of Al
Q.18.
The radii of F, F-, O and O2- are in order of ..[ AIIMS 1999]
27%
a) O2- > F- > F > O
13%
b) F- >O2- > F > O
33%
c) O2- > O > F- > F
27%
d) O2- > F- > O > F
Q.19.
Which of the following does not exhibit the periodicity in properties of the elements? [ MP PMT 2001]
0%
a) Ionization energy
92%
b) N/P ratio
0%
c) Electronegativity
8%
d) Atomic radius
Q.20.
The one with the largest size is .... [ Pb CET 1997]
20%
a) Cl
40%
b) Cl-
20%
c) Cl+
20%
d) Cl+3
Q.21.
Ionic radii of ... [ IIT 1999]
14%
a) Ti4+ < Mn2+
43%
b) 35Cl- < 37Cl-
29%
c) K+ > Cl-
14%
d) P3+ > P5+
Q.22.
Which of the following ionic radius would be maximum? [ MP CET 1998]
30%
a) C4-
10%
b) N3-
30%
c) O2-
30%
d) Mg2+
Q.23.
Which of the following have same number of electrons in the outermost orbit? [ AFMC 2000]
25%
a) Pb, Sb
12%
b) N, O
38%
c) As, Bi
25%
d) P, Ca
Q.24.
Set containing isoelectronic species is .. [ CBSE PMT 2000]
56%
a) C22-, NO+, CN-, O22+
33%
b) CO, NO, O2, CN
0%
c) CO2, NO2, O2, N2O5
11%
d) CO, CO2, NO, NO2
Q.25.
Going from fluorine to chlorine, bromine and iodine, the electronegativity ... [ MP PMT 2000]
10%
a) Increases
70%
b) Decreases
10%
c) First decreases then increases
10%
d) Changes randomly
Q.26.
The second ionization potential of an element M is the energy required to ... [ JIPMER 1997]
50%
a) Remove one mole of electrons from one mole of gaseous cations of the elements
25%
b) Remove one mole of electrons from one mole of gaseous anions
12%
c) Remove one mole of electrons from one mole of monovalent gaseous cations of the element
12%
d) Remove two moles of electron from one mole of monovalent gaseous atom
Q.27.
First ionization potential will be maximum for .. [ CPMT 2000]
0%
a) Uranium
44%
b) Hydrogen
44%
c) Lithium
11%
d) Iron
Q.28.
Going from fluorine to chlorine, bromine and iodine, the electronegativity .. [ MP PMT 2000]
14%
a) Increases
57%
b) Decreases
14%
c) First decreases then increases
14%
d) Changes randomly
Q.29.
The atomic radius increases as we move down a group because... [ Tamilnadu CET 2001]
25%
a) Effective nuclear charge increases
12%
b) Atomic mass increases
38%
c) Additive electrons are accommodated in new electron level
25%
d) Atomic number increases
Q.30.
Which of the following is not isoelectronic? [ MP PET 2002]
0%
a) Na+
33%
b) Mg2+
22%
c) O2-
44%
d) Cl-
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