Q.1
The common features among the species CN-, CO and NO+ are .... [ IIT 2001]
  • a) Bond order three and isoelectronic
  • b) Bond order three and weak field ligands
  • c) Bond order two and π-acceptors
  • 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]
  • a) A > B > C
  • b) C > B > A
  • c) B > C > A
  • d) C > A > B
Q.3
The decreasing order of the ionization potential of the following elements is ... [ MP PMT 2001]
  • a) Ne > Cl > P > S > Al > Mg
  • b) Ne > Cl > P > S > Mg > Al
  • c) Ne > Cl > S > P > Mg > Al
  • 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"; } }); }
  • a) Na+
  • b) Mg2+
  • c) Al3+
  • d) P5+
Q.5
Which one of the following has highest ionization potential? [ EAMCET 1998]
  • a) Li+
  • b) Mg+
  • c) Al+
  • d) Ne
Q.6
The elements in which 4f orbitals are progressively filled up are called as ... [ MP CEE 1996]
  • a) Actinides
  • b) Transition elements
  • c) Lanthanides
  • d) Halogens
Q.7
Electronic configuration of four neutral atoms is given below. Which of the corresponding element would not be paramagnetic... [ AMU 1997]
  • a) 1s2, 2s2, 2p6
  • b) 1s2, 2s2, 2p1
  • c) 1s2, 2s2, 2p5
  • d) 1s2, 2s2, 2p4
Q.8
Highest electron affinity is shown by .. [ DEC 2000]
  • a) O-
  • b) F-
  • c) Cl2
  • d) F2
Q.9
Which of the following isoelectronic ions has the lowest ionization energy? [ Haryana CEET 2001]
  • a) K+
  • b) Ca2+
  • c) Cl-
  • d) S2-
Q.10
Which of the following sets of atomic numbers belong to that of alkali metal? [ AFMC 2001]
  • a) 1, 12, 30, 4, 62
  • b) 37, 19, 3, 55
  • c) 9, 17, 35, 53
  • d) 12, 20, 56, 88
Q.11
Which of the following is most electronegative? [ CPMT 1999 ]
  • a) Lead
  • b) Silicon
  • c) Carbon
  • d) Tin
Q.12
The correct order of radii is ... [ IIT 2000 ]
  • a) N < Be < B
  • b) F- < O2- < N3-
  • c) N < Li < K
  • d) Fe3+ < Fe2+ < Fe4+
Q.13
Whih of the following does not represent the correct order of the property indicated .. [ CBSE PMT 1997 ]
  • a) Sc3+ > Cr3+ > Fe3+ > Mn3+ ( ionic radii )
  • b) Sc < Ti < Cr < Mn ( density )
  • c) Mn2+ > Ni2+ < Co2+ < Fe2+ ( Ionic radii )
  • 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]
  • a) Ionization energy
  • b) Atomic radius
  • c) Boiling point
  • d) Density
Q.15
Which of the following is not a transition metal? .. [ Chd.CET 2000]
  • a) Zr
  • b) TC
  • c) Re
  • d) Np
Q.16
The set representing the correct order of first ionization potential is ... [ IIT 2001]
  • a) K > Na > Li
  • b) Be > Mg > Ca
  • c) B > C > N
  • d) Ge > Si > C
Q.17
The incorrect statement among the following is : ... [ IIT 1997]
  • a) The first ionization potential of Al is less than the first ionization potential of Mg
  • b) The second ionization potential of Mg is greater than the second ionization potential of Na
  • c) The first ionization potential of Na is less than the first ionization potential of Mg
  • 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]
  • a) O2- > F- > F > O
  • b) F- >O2- > F > O
  • c) O2- > O > F- > F
  • d) O2- > F- > O > F
Q.19
Which of the following does not exhibit the periodicity in properties of the elements? [ MP PMT 2001]
  • a) Ionization energy
  • b) N/P ratio
  • c) Electronegativity
  • d) Atomic radius
Q.20
The one with the largest size is .... [ Pb CET 1997]
  • a) Cl
  • b) Cl-
  • c) Cl+
  • d) Cl+3
Q.21
Ionic radii of ... [ IIT 1999]
  • a) Ti4+ < Mn2+
  • b) 35Cl- < 37Cl-
  • c) K+ > Cl-
  • d) P3+ > P5+
Q.22
Which of the following ionic radius would be maximum? [ MP CET 1998]
  • a) C4-
  • b) N3-
  • c) O2-
  • d) Mg2+
Q.23
Which of the following have same number of electrons in the outermost orbit? [ AFMC 2000]
  • a) Pb, Sb
  • b) N, O
  • c) As, Bi
  • d) P, Ca
Q.24
Set containing isoelectronic species is .. [ CBSE PMT 2000]
  • a) C22-, NO+, CN-, O22+
  • b) CO, NO, O2, CN
  • c) CO2, NO2, O2, N2O5
  • d) CO, CO2, NO, NO2
Q.25
Going from fluorine to chlorine, bromine and iodine, the electronegativity ... [ MP PMT 2000]
  • a) Increases
  • b) Decreases
  • c) First decreases then increases
  • d) Changes randomly
Q.26
The second ionization potential of an element M is the energy required to ... [ JIPMER 1997]
  • a) Remove one mole of electrons from one mole of gaseous cations of the elements
  • b) Remove one mole of electrons from one mole of gaseous anions
  • c) Remove one mole of electrons from one mole of monovalent gaseous cations of the element
  • d) Remove two moles of electron from one mole of monovalent gaseous atom
Q.27
First ionization potential will be maximum for .. [ CPMT 2000]
  • a) Uranium
  • b) Hydrogen
  • c) Lithium
  • d) Iron
Q.28
Going from fluorine to chlorine, bromine and iodine, the electronegativity .. [ MP PMT 2000]
  • a) Increases
  • b) Decreases
  • c) First decreases then increases
  • d) Changes randomly
Q.29
The atomic radius increases as we move down a group because... [ Tamilnadu CET 2001]
  • a) Effective nuclear charge increases
  • b) Atomic mass increases
  • c) Additive electrons are accommodated in new electron level
  • d) Atomic number increases
Q.30
Which of the following is not isoelectronic? [ MP PET 2002]
  • a) Na+
  • b) Mg2+
  • c) O2-
  • d) Cl-
0 h : 0 m : 1 s