Periodic Table And Structure Of Atom- Combined Test

30 Questions | Total Attempts: 31

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Periodic Table And Structure Of Atom- Combined Test

TIME ALLOTTED : 60 minutes For every correct answer, you will be awarded +4 marks. For every wrong answer, -1 marks will be deducted. For every unattempted question, you will be given 0 marks. ALL THE BEST


Questions and Answers
  • 1. 
    Which of the following sets of quantum numbers represents the highest energy of an atom?
    • A. 

      N=3, l=1, m=1, s=+1/2

    • B. 

      N=3, l=2, m=1, s=+1/2

    • C. 

      N=4, l=0, m=0, s=+1/2

    • D. 

      N=3, l=0, m=0, s=+1/2

  • 2. 
    In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in absence of magnetic and electric field?     (A) n=1, l=0, m=0 (B) n=2, l=0, m=0 (C) n=2, l=1, m=1 (D) n=3, l=2, m=1 (E) n=3, l=2, m=0
    • A. 

      D and E

    • B. 

      C and D

    • C. 

      B and C

    • D. 

      A and B

  • 3. 
    Which of the following sets of quantum numbers is correct for an electron in 4f orbital?
    • A. 

      N=4, l=3, m=+4, s=+1/2

    • B. 

      N=4, l=4, m=-4, s=-1/2

    • C. 

      N=4, l=3, m=+1, s=+1/2

    • D. 

      N=3, l=2, m=-2, s=+1/2

  • 4. 
    Which one of the following sets of ions represents the collection of iso-electronic species?
    • A. 

      K+, Ca2+, Sc3+, Cl-

    • B. 

      Na+, Ca2+, Sc3+, F-

    • C. 

      K+, Cl-, Mg2+, Sc3+

    • D. 

      Na+, Mg2+, Al3+, Cl-

  • 5. 
    Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar?
    • A. 

      Ca < S < Ba < Se < Ar

    • B. 

      S < Se < Ca < Ba < Ar

    • C. 

      Ba < Ca < Se < S < Ar

    • D. 

      Ca < Ba < S < Se < Ar

  • 6. 
    The increasing order of the ionic radii of the given iso-electronic species is-
    • A. 

      Cl- , Ca2+ , K+ , S2-

    • B. 

      S2- , Cl- , Ca2+ , K+

    • C. 

      Ca2+, K+, Cl- , S2-

    • D. 

      K+, S2-, Ca2+, Cl-

  • 7. 
    The correct order of electron gain enthalpy with negative sign of F, Cl, Br and I, having atomic number 9, 17, 35 and 53 respectively is-
    • A. 

      I > Br > Cl > F

    • B. 

      F > Cl > Br > I

    • C. 

      Cl > F > Br > I

    • D. 

      Br > Cl > F > I

  • 8. 
    The correct sequence which shows decreasing order of the ionic radii of the elements-
    • A. 

      Al3+ > Mg2+ > Na+ > F+ > O2-

    • B. 

      Na+ > Mg2+ > Al3+ > O2- > F-

    • C. 

      Na+ > F- > Mg2+ > O2- > Al3+

    • D. 

      O2- > F- > Na+ > Mg2+ > Al3+

  • 9. 
    Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements give the correct picture?
    • A. 

      Reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group

    • B. 

      In both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group

    • C. 

      Chemical reactivity increases with increase in atomic number down the group in both alkali metals and halogens

    • D. 

      In alkali metals, the reactivity increases but in the halogens it decreases with increase in atomic number down the group

  • 10. 
    According to the periodic law of elements, the variation in properties of elements is related to their
    • A. 

      Atomic masses

    • B. 

      Nuclear Masses

    • C. 

      Atomic numbers

    • D. 

      Nuclear neutron-proton number ratios

  • 11. 
    The atomic numbers of vanadium (V) , Chromium (Cr), Manganese (Mn) and iron(Fe) are respectively 23, 24 and 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?
    • A. 

      V

    • B. 

      Cr

    • C. 

      Mn

    • D. 

      Fe

  • 12. 
    Which one of the following statement is incorrect for an atom having electronic configuration 2, 8, 7:
    • A. 

      It forms diatomic molecules

    • B. 

      It is a non-metal element

    • C. 

      Its valency is 1

    • D. 

      It forms basic oxide

  • 13. 
    Which of the following electronic configuration corresponds to atom with the lowest ionisation enthalpy?
    • A. 

      1s2 2s2 2p3

    • B. 

      1s2 2s2 2p6 3s1

    • C. 

      1s2 2s2 2p6

    • D. 

      1s2 2s2 2p5

  • 14. 
    Lanthanide contraction relates to decrease in-
    • A. 

      Atomic radii

    • B. 

      Atomic as well as M3+ radii

    • C. 

      Valence electron

    • D. 

      Oxidation state

  • 15. 
    Which of the following has no unit-
    • A. 

      Electronegativity

    • B. 

      Electron affinity

    • C. 

      Ionisation energy

    • D. 

      Excitation potential

  • 16. 
    Ionization energy of nitrogen is more than oxygen due to-
    • A. 

      Increased attraction of electron towards nucleus

    • B. 

      Extra stability of half filled 'p' orbital

    • C. 

      Small size of N2

    • D. 

      None of the above

  • 17. 
    In which of the following arrangements the order is NOT according to the property indicated against it?
    • A. 

      Al3+ < Mg2+ < Na+ < F- : Increasing ionic size

    • B. 

      B < C < N < O : increasing first ionization energy

    • C. 

      I < Br < F < Cl - increasing electron gain enthalpy (With negative sign)

    • D. 

      Li < Na < K < Rb - increasing metallic radius

  • 18. 
    Which one of the following is isoelectronic-
    • A. 

      Fe3+, Co3+

    • B. 

      Fe3+, Mn2+

    • C. 

      Co3+, Sr3+

    • D. 

      Sc3+, Ti3+

  • 19. 
    Similarity between the characteristics of Li and Mg is termed as-
    • A. 

      Direct relation

    • B. 

      Group relation

    • C. 

      Diagonal relation

    • D. 

      Linear relation

  • 20. 
    In alkali metals, correct order of 1st ionisation energy is-
    • A. 

      Li > Na > K > Rb

    • B. 

      K > Rb > Li > Na

    • C. 

      Li > Na > Rb > K

    • D. 

      Rb > Li > K > Na

  • 21. 
    Elements with similar chemical properties-
    • A. 

      Occur only within the same period

    • B. 

      Have identical atomic mass(weight)

    • C. 

      Have identical number of neutrons

    • D. 

      Have the same number of electrons in the outer shell

  • 22. 
    Zinc and Copper have similarity in their-
    • A. 

      Group number

    • B. 

      Electronic configuration

    • C. 

      Number of electron present in their d subshells

    • D. 

      Both are transition metals

  • 23. 
    Which of the following statements is false?
    • A. 

      Screening effect increases down the group

    • B. 

      Zeff increases down the group

    • C. 

      Zeff. increases in a period

    • D. 

      All of the above

  • 24. 
    According to Pauli's exclusion principle, spin quantum number of two electrons in any subshell can be -
    • A. 

      +1/2, +1/2

    • B. 

      -1/2 , +1/2

    • C. 

      -1/2 , -1/2

    • D. 

      0,1

  • 25. 
    If Hund's rule is violated, what is the minimum number of electrons that can be present in a 2p orbital of Nitrogen atom?
    • A. 

      0

    • B. 

      1

    • C. 

      2

    • D. 

      3

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