Periodic Table · JEE Main previous year questions

2019 7 questions

1. Q762019 · 12 Apr 2019 · Shift 1

   The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are:

   1. A.16, 6 and 3
   2. B.15, 6 and 12
   3. C.16, 5 and 2
   4. D.15, 5 and 3
   Show answer

   Answer: D

2. Q712019 · 12 Apr 2019 · Shift 2

   The pair that has similar atomic radii is :

   1. A.Mo and W
   2. B.Mn and Fe
   3. C.Ti and Hf
   4. D.Sc and Ni
   Show answer

   Answer: A

3. Q722019 · 10 Apr 2019 · Shift 2

   The correct order of the first ionization enthalpies is :

   1. A.Ti < Mn < Zn < Ni
   2. B.Zn < Ni < Mn < Ti
   3. C.Mn < Ti < Zn < Ni
   4. D.Ti < Mn < Ni < Zn
   Show answer

   Answer: D

4. Q802019 · 9 Apr 2019 · Shift 1

   The element having greatest difference between its first and second ionization energies, is :

   1. A.Ba
   2. B.Ca
   3. C.Sc
   4. D.K
   Show answer

   Answer: D

5. Q682019 · 8 Apr 2019 · Shift 2

   The IUPAC symbol for the element with atomic number 119 would be :

   1. A.Uun
   2. B.Une
   3. C.Uue
   4. D.Unh
   Show answer

   Answer: C

6. Q782019 · 12 Jan 2019 · Shift 2

   The correct order of atomic radii is :

   1. A.Ho > N > Eu > Ce
   2. B.Ce > Eu > Ho > N
   3. C.N > Ce > Eu > Ho
   4. D.Eu > Ce > Ho > N
   Show answer

   Answer: D

7. Q712019 · 9 Jan 2019 · Shift 1

   In general, the properties that decrease and increase down a group in the periodic table, respectively, are :

   1. A.Atomic Radius and Electronegativity
   2. B.Electron Gain Enthalpy and Electronegativity.
   3. C.Electronegativity and Atomic Radius.
   4. D.Electronegativity and Electron Gain Enthalpy.
   Show answer

   Answer: C