CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES Quiz -14

Dear Readers,

JEE Advanced is a high level exam that checks your concept by putting various types of questions. The questions are in a different format from JEE mains.m, herein the questions are : single correct multiple choice questions, multiple correct multiple choice questions, statement based questions and comprehension type questions.

Q1. The size of the second and third row transition elements being almost the same. This is due to

•  d-and f-orbitals do not shield the nuclear charge very effectively
•  Lanthanide contraction
•   Both (a) & (b) are true
•   None of the above is true

Solution. (c)

Q2. Out of F_2,Cl_2,Br_2 and I_2, most oxidizing agent isOut of F_2,Cl_2,Br_2 and I_2, most oxidizing agent is

•  F2
•  Br2
•  Cl2
•   I2

Solution.
(a)

Q3.  Select the correct order of 〖(IE)〗_1

•   Cu
•  Ag
•  Hg>Au>Tl
•  None of these

Solution. (d)

Q4.  Of the four ∆H values needed to calculate the lattice energy using the Born-Haber cycle, the one that is most difficult to measure is

•  The heat of sublimation of the metal
•  The heat of formation of gaseous atoms of the non-metal
•  The ionization energy of the metal
•  The electron affinity of the non-metal

Solution (b)

Q5. The lanthanides contraction refers to

•  Ionic radius of the series
•  Valence electrons of the series
•  The density of the series
•   Electronegativity

Solution  (b)

Q6. The statement that is not correct for the periodic classification of elements is

•  The properties of elements are the periodic functions of their atomic numbers
•   Non-metallic elements are lesser in number than metallic elements
• The first ionization energies of elements along a period do not vary in a regular manner with increase in atomic number
•  For transition elements the d-subshells are filled with electron monotonically with increase in atomic number

Solution. (d)

Q7.N_0/2 atoms of X(g) are converted into X^+ (g) by energy E_1. N_0/2 atoms of X(g) are converted into X^- (g) by energy E_2. Hence, ionization potential and electron affinity of X(g) are

•  〖2E〗_1/N_0 ,2(E_1-E_2 )/N_0
•  〖2E〗_1/N_0 ,〖2E〗_2/N_0
•  ((E_1-E_2 ))/N_0 ,〖2E〗_2/N_0
•   None is correct

Solution
(a)

Q8.Following the transition elements, 〖(IE)〗_1 drops abruptly in Ga, In and Tl. This is due to

•  Decrease in effective nuclear charge
•  Increase in atomic radius
•  Removal of an electron from the singly occupied np-orbitals of higher energy than the ns-orbitals of Zn, Cd and Hg
•   None of the above is correct

Solution
(b)

Q9.Electronegativity and electron affinity of an element A are X and Y respectively. Hence, ionization potential of A is

•  (X+Y)/2
•   2X-Y
•   2Y-X
•  2X+Y

Solution
(a) AB_2 has bcc structure, A^(2+) possess face centred cubic lattice. B^- ions occupy all the (100%) tetrahedral voids. Thus each A^(2+) is in contact with B^- and each B^- with 4A^(2+) ions.

Q10.Following triads have approximately equal size

•  Na^+,Mg^(2+),Al^(3+) (iso-electronic)
•   F^-,Ne,O^(2-) (iso-electronic)
•  Fe,Co,Ni
•  Mn^+,Fe^(2+),Cr (iso-electronic)

Solution
(b) All factual statements