Public one mark questions Periodic Classification Of Elements

11th Standard

    Reg.No. :
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Chemistry

Answer each of the following questions
Time : 01:00:00 Hrs
Total Marks : 100

    Part - A

    100 x 1 = 100
  1. Match the list I with List II and select the correct answer using. the code given below the lists.

    List I List II
    A A halogen 1 Cesium
    B An alkali metal 2 Germanium
    C A chalcogen 3 Iodine
    D A metalloid 4 Selenium
    (a)
    A B C D
    1 3 2 4
    (b)
    A B C D
    4 3 1 2
    (c)
    A B C D
    3 1 4 2
    (d)
    A B C D
    2 1 4 3
  2. Period of an element is represented by _____ quantum number

    (a)

    Principal

    (b)

    Azimuthal

    (c)

    Magnetic

    (d)

    Spin

  3. The first list of 23 chemical elements was published by _____ in the year 1789.

    (a)

    Berzelius

    (b)

    Dobereiner

    (c)

    Lavoisier

    (d)

    John Dalton

  4. Match the list I with List II and select the correct answer using. the code given below the lists.

    List I List II
    A Chancourtois 1 Addition of synthetic elements
    B Rang 2 Families and periods Long form
    C Glenn Seaborg 3 Modem periodic law
    D Moseley 4 First periodic law
    (a)
    A B C D
    1 3 2 4
    (b)
    A B C D
    4 2 1 3
    (c)
    A B C D
    3 4 1 2
    (d)
    A B C D
    2 1 4 3
  5. Which of the following statement (s) about the Modern Periodic Table is are incorrect
    i. The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number.
    ii. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses.
    iii. Isotopes are placed in adjoining group (s) in the Periodic Table.
    iv. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number.

    (a)

    (i) only

    (b)

    (i), (ii) and (iii)

    (c)

    (i), (ii) and (iv)

    (d)

    (iv) only

  6. Which of the following is Dobereiner's triad?

    (a)

    Ne,Ca,Na

    (b)

    H2, N2, O2

    (c)

    Li, Na, K

    (d)

    Na, Br, K

  7. The statement that is not correct for modern classification of element is
    (1) The properties of elements are periodic function of these atomic numbers.
    (2) The ionisation enthalpy of the elements generally increase with increase in atomic number
    (3) For transition elements the 3d orbitals are filled after 3p-orbitals and befire 4s orbitals.
    (4) Fifth period contain 18 elements.

    (a)

    1 and 2

    (b)

    2 and 3

    (c)

    4 only

    (d)

    3 only

  8. What would be the formula of the compound formed by A and B, where A has the valence 3 and B has the valence 3?

    (a)

    AB

    (b)

    AB3

    (c)

    A3B

    (d)

    3AB3

  9. An element M combines with CI. What would be the formula of the compound obtained if M has a valence of 2?

    (a)

    MCI

    (b)

    MCl2

    (c)

    M2CI

    (d)

    M2Cl2

  10. Law of triad was unable to explain for the element

    (a)

    Ca, Sr and Ba

    (b)

    Fe, Co, Ni

    (c)

    Li, Na, K

    (d)

    CI, Br, I

  11. Law of octaves was proposed by _____

    (a)

    Lothar Meyer

    (b)

    Johann Dobereiner

    (c)

    Newland

    (d)

    Mendeleev

  12. ______ proposed modern periodic law.

    (a)

    Henry Moseley

    (b)

    Mendeleev

    (c)

    Newland

    (d)

    Dobrainer

  13. The atomic weight of Au is ______

    (a)

    195

    (b)

    197

    (c)

    198

    (d)

    196

  14. The horizontal rows in the periodic table are called as ______

    (a)

    group

    (b)

    family

    (c)

    period

    (d)

    column

  15. Match the list I with list II and select the correct answer using the code given below the list.

    List I List II
    A de Chancourtois 1 Addition of synthetic elements.
    B Moseley 2 first periodic law
    C Newland 3 Modem periodic law
    D Glenn seaborg 4 Law of octaves
    (a)
    A B C D
    1 2 3 4
    (b)
    A B C D
    3 2 4 1
    (c)
    A B C D
    2 3 4 1
    (d)
    A B C D
    2 3 1 4
  16. Consider the following statements according to modern periodic table.
    (i) Modern periodic table contains 18 vertical columns and 7 horizontal rows.
    (ii) The elements after uranium are called transuranium elements
    (iii) The 17th group elements are called chalcogens
    (iv) The elements of Groups 13 to 18 are called p-block elements.
    which of the following statement(s) given above is/are correct.

    (a)

    (i), (iii) & (iv)

    (b)

    (i), (ii) & (iii)

    (c)

    (i), (ii) & (iv)

    (d)

    all the 4 statements

  17. The vertical columns in the periodic table are called as

    (a)

    family

    (b)

    group

    (c)

    period

    (d)

    both (a) and (c)

  18. There are _____ periods in the periodic table.

    (a)

    18

    (b)

    7

    (c)

    6

    (d)

    5

  19. The number of groups in the periodic table

    (a)

    7

    (b)

    18

    (c)

    5

    (d)

    6

  20. The element with atomic number 57 belongs to _____

    (a)

    s-block

    (b)

    p-block

    (c)

    d-block

    (d)

    f-block

  21. Lithium shows diagonal relationship with _____

    (a)

    Mg

    (b)

    Al

    (c)

    Na

    (d)

    Si

  22. The electronic configuration of nitrogen is _____

    (a)

    Is22s22p3

    (b)

    Is22s2 2Px12py12P21

    (c)

    Is22s12p4

    (d)

    both (a) and (b)

  23. The first transition series is from _____ to _____

    (a)

    Sc to Zn

    (b)

    Hf to Hg

    (c)

    Y to Cd

    (d)

    Ac to Lr

  24. The element with Z = 24 is placed in the _____ period

    (a)

    5

    (b)

    2

    (c)

    3

    (d)

    4

  25. ______ is the lightest metal known.

    (a)

    Na

    (b)

    Li

    (c)

    Mg

    (d)

    Al

  26. He is placed in ______ group.

    (a)

    1

    (b)

    2

    (c)

    17

    (d)

    18

  27. Pd has exceptional electronic configuration of 4d10 5s0 It belongs to period ______ and group _____

    (a)

    4, 11

    (b)

    5, 10

    (c)

    6, 9

    (d)

    3, 16

  28. The elements at the extreme left of periodic table has strong behaviour ______

    (a)

    Oxidizing

    (b)

    Reducing

    (c)

    both oxidisation and reducing

    (d)

    electro negative

  29. On moving diagonally across the periodic table, the second and third period elements show certain similarities. Pick out the pair which shows such a property.

    (a)

    Be & Na

    (b)

    Be & AI

    (c)

    Be & Mg

    (d)

    B & AI

  30. d-block elements form ____ compounds.

    (a)

    ionic

    (b)

    covalent

    (c)

    Coordinate

    (d)

    both (a) and (b)

  31. X, Y and Z are three members of a Doboreiner's triad. If the atomic mass of X is 7 and that of Z is 39, what in the atomic mass of Y?

    (a)

    23

    (b)

    7

    (c)

    46

    (d)

    39

  32. Modern periodic law is.

    (a)

    The physical and chemical properties of the elements are periodic functions of their atomic numbers.

    (b)

    The physical and chemical properties of the elements depend upon the energy of the electrons.

    (c)

    The physical and chemical properties of the elements depend upon atomic weight.

    (d)

    None of these

  33. Elements which generally exhibit multiple oxidation states and whose ions are usually coloured are

    (a)

    metalliods

    (b)

    transition elements

    (c)

    non-metals

    (d)

    gases

  34. The elements eka aluminum and eka silicon named by Mendeleev known today as

    (a)

    gallium and germanium

    (b)

    germanium and silicon

    (c)

    aluminium and silicon

    (d)

    indium and thallium

  35. Find the incorrect statement.

    (a)

    Smallest atom of periodic table is He

    (b)

    p-block elements are metals, nonmetals and metalloids

    (c)

    Noble gases have 8 valence electrons except He

    (d)

    Valence electron and valency is same for group I

  36. Valence electrons in the atom of element A is 4 and in the element B is 2. Most probable compound fc from A and B is

    (a)

    AB3

    (b)

    AB2

    (c)

    A2B3

    (d)

    A2B

  37. Which of the following set has atomic numbers of only representative elements?

    (a)

    2,10,17,35

    (b)

    2,12,22,32

    (c)

    3,15,35,45

    (d)

    4,20,36,79

  38. Halogens belong to the

    (a)

    s-block

    (b)

    p-block

    (c)

    d-block

    (d)

    Zero group of the periodic table

  39. Characteristic of transition elements is incomplete

    (a)

    d-orbitals

    (b)

    f-orbitals

    (c)

    p-orbitals

    (d)

    s-orbitals

  40. In the first transition series the incoming electron enters the

    (a)

    4d-orbital

    (b)

    3d-orbital

    (c)

    5d-orbital

    (d)

    6d-orbital

  41. The number of elements in the first period of the modern periodic table is _____

    (a)

    2

    (b)

    8

    (c)

    18

    (d)

    32

  42. Group 16 of the periodic table is called as ____

    (a)

    oxygen family

    (b)

    chalcogen family

    (c)

    both a and b

    (d)

    halogen family

  43. The metal which is a liquid at room temperature is _______

    (a)

    Gallium

    (b)

    Mercury

    (c)

    Germanium

    (d)

    Tellurium

  44. Representative elements are those which belong to

    (a)

    s and d-blocks

    (b)

    s and p-blocks

    (c)

    p and d-blocks

    (d)

    d and f-blocks

  45. The element with atomic number 103 is ______

    (a)

    lawrencium

    (b)

    Mendelevium

    (c)

    fermium

    (d)

    nobelium

  46. Match the list I with List II and select the correct answer using. the code given below the lists.

    List I List II
    A Metalloid 1 Cerium
    B Noble gas 2 Nobelium
    C Trans uranium element 3 Arsenic
    D Lanthanide 4 Argon
    (a)
    A B C D
    1 3 2 4
    (b)
    A B C D
    4 2 1 3
    (c)
    A B C D
    3 4 2 1
    (d)
    A B C D
    2 1 4 3
  47. Elements whose atoms have their sand p-sub-levels complete are the _____

    (a)

    Normal elements

    (b)

    Transition elements

    (c)

    Halogens

    (d)

    Inert gases

  48. Excluding hydrogen and helium, the smallest element in the periodic table is _____

    (a)

    Lithium

    (b)

    Oxygen

    (c)

    Fluorine

    (d)

    Chlorine

  49. Match the list I with list II and select the correct answer using the code given below the list.

    List I List II
    A Unnilbium 1 Bohrium
    B Unnil hexium 2 Ronigenium
    C unnnunium 3 scaborgium
    D Unnilsepluim 4 Nobelium
    (a)
    A B C D
    1 2 4 3
    (b)
    A B C D
    3 1 4 2
    (c)
    A B C D
    4 3 2 1
    (d)
    A B C D
    4 3 1 2
  50. The general electronic configuration of s-block element is ______

    (a)

    ns1

    (b)

    ns2

    (c)

    ns1 and ns2

    (d)

    ns1-2

  51. The p-block elements comprise of group

    (a)

    1,2

    (b)

    13 to 18

    (c)

    3 to 12

    (d)

    12 to 18

  52. The general electronic configuration of p-block element is _____

    (a)

    ns1-2

    (b)

    np1-6

    (c)

    np6

    (d)

    ns2 np6

  53. The general electronic configuration of d-block element is _____

    (a)

    ns2np6

    (b)

    (n-1) d1-10 ns0-2

    (c)

    (n-1) d1 ns0-2

    (d)

    (n-1) d0-10 ns2

  54. d-block elements form _____ compounds.

    (a)

    ionic

    (b)

    covalent

    (c)

    metallic

    (d)

    both (a) and (b)

  55. The elements in which extra electrons enters into (n - 2) f-orbitals are called ____ elements.

    (a)

    p-block

    (b)

    d-block

    (c)

    f-block

    (d)

    s-block

  56. The element with atomic number 31 belongs to _____

    (a)

    s-block

    (b)

    p-block

    (c)

    d-block

    (d)

    f-block

  57. The oxidation state of alkali metal is _______

    (a)

    +2

    (b)

    +1

    (c)

    +3

    (d)

    0

  58. All the elements in a group in the periodic table have the same

    (a)

    electronic configuration

    (b)

    number of electrons in the valence shell

    (c)

    atomic number

    (d)

    atomic weight

  59. Which pair of elements has the same characteristic chemical properties?

    (a)

    Z = 13, Z = 22

    (b)

    Z = 2, Z =4

    (c)

    Z = 4, Z = 24

    (d)

    Z = 3, Z = 11

  60. The IUPAC name of element having atomic number 108 is

    (a)

    Unniloctium

    (b)

    Ununoctium

    (c)

    Nilniloctium

    (d)

    Ununoctinium

  61. Pick the metalloid among the following elements

    (a)

    P

    (b)

    S

    (c)

    Si

    (d)

    Al

  62. Which one among the following exhibits a valency greater than 4?

    (a)

    Na

    (b)

    P

    (c)

    H

    (d)

    Ar

  63. Which one among the following species has the largest atomic radius?

    (a)

    Na

    (b)

    Mg

    (c)

    AI

    (d)

    Si

  64. The correct order of size among Br, Br+, Br- is

    (a)

    Br < Br+ < Br-

    (b)

    Br+ < Br < Br-

    (c)

    Br < Br- < Br+

    (d)

    Br- < Br+ < Br-

  65. The elements having highest ionization energies within their periods are called _____

    (a)

    Halogens

    (b)

    Noble gases

    (c)

    Alkali metals

    (d)

    Transition elements

  66. Arrange the following ions in order of decreasing ionic radii He, Li2+, Be3+

    (a)

    He > Li2+ > Be3+

    (b)

    Li2+ > Be3+ > He

    (c)

    He > Li2+ > Be3+

    (d)

    Be3+ > Li2+ > He

  67. Across the period, Ionisation energy _______

    (a)

    increases

    (b)

    decreases

    (c)

    does not vary

    (d)

    first decreases and then increases

  68. Which among the following has the highest ionisation energy

    (a)

    Ne

    (b)

    Na

    (c)

    K

    (d)

    Kr

  69. Which of the following statements are correct?
    (i) Helium has the highest first ionisation enthalpy
    (ii) Chlorine has less electron affinity than fluorine
    (iii) Ne has more ionisation energy than Boron.
    (iv) The ionisation energy noble gases of zero

    (a)

    (i), (ii) and (iii)

    (b)

    (i) and (iii)

    (c)

    (i), (iii) and (iv)

    (d)

    (i), (ii), (iii) and (iv)

  70. Which of the following factor decreases across the period?

    (a)

    Ionisation energy

    (b)

    electron affinity

    (c)

    atomic radius

    (d)

    electronegativity

  71. Match the list I with list II and select the correct answer using the code given below the list.

    List I List II
    A Ionisation energy 1 ionic compound
    B electro negativity 2 alloys
    C s-block elements 3 KJ mol-1
    D d-block elements 4 No unit
    (a)
    A B C D
    1 2 3 4
    (b)
    A B C D
    3 2 1 4
    (c)
    A B C D
    2 3 1 4
    (d)
    A B C D
    3 4 1 2
  72. The most electronegative element of the periodic table is _______

    (a)

    Iodine

    (b)

    Flourine

    (c)

    Chlorine

    (d)

    Oxygen

  73. With respect to chlorine, hydrogen will be

    (a)

    Electropositive

    (b)

    Electronegative

    (c)

    Neutral

    (d)

    None of these

  74. "The relative tendency of a bonded atom in a molecule to attract the shared pair of electrons towards itself" is termed as_____

    (a)

    electron gain enthalpy

    (b)

    electronegativity

    (c)

    electron affinity

    (d)

    ionisation energy

  75. Which of the following property has no unit?

    (a)

    ionisation energy

    (b)

    electronegativity

    (c)

    electron affinity

    (d)

    atomic radius

  76. Among the elements given below,_____ has the highest value of electro negativity.

    (a)

    Li

    (b)

    Ne

    (c)

    F

    (d)

    Be

  77. In a group with decrease in electronegativity the metallic character
    (a) decreases across a period
    (b) increases down the group
    (c) does not vary
    Which of the above statement(s) is true

    (a)

    a only

    (b)

    b only

    (c)

    both (a) and (b)

    (d)

    (c) only

  78. Which of the following processes involves absorption of energy?

    (a)

    Cl(g) +e- ⟶ Cl-

    (b)

    O-(g) +e- ⟶ O2-

    (c)

    O(g) +e- ⟶ O(g)-

    (d)

    S(g)+e- ⟶ S-(g)

  79. Which set of elements shows positive electron gain enthalpy?

    (a)

    He,N,O

    (b)

    Ne,N,Cl

    (c)

    O,Cl,F

    (d)

    N,He,Ne

  80. Which of the following has the highest positive electron gain enthalpy?

    (a)

    F

    (b)

    O-

    (c)

    Na+

    (d)

    Mg2+

  81. Match the list I with List II and select the correct answer using. the code given below the lists.

    List I List II
    A.Element with first highest
    ionization enthalpy
    1.Fluorine
    B.Element with second
    highest ionization enthalpy
    2.Chlorine
    C.Element with highest 
    electron gain enthalpy
    3.Sodium
    D.Element with highest
    electronegativity
    4.Neon
    (a)
    A B C D
    1 3 2 4
    (b)
    A B C D
    4 3 2 1
    (c)
    A B C D
    3 1 4 2
    (d)
    A B C D
    2 1 4 3
  82. Ionisation enthalpy is an _____ process.

    (a)

    exothermic

    (b)

    endothermic

    (c)

    reversible

    (d)

    both (a) and (b)

  83. The effective nuclear charge across the period (from left to right)

    (a)

    Decreases

    (b)

    Increases

    (c)

    First decreases and then increases

    (d)

    First increases and then decreases

  84. Which of the following N3-, O2-, F- is largest in size?

    (a)

    N3-

    (b)

    O2-

    (c)

    F-

    (d)

    All of these

  85. The radii of F, F-, O and O2- are in the order

    (a)

    O2- > O> F- > F

    (b)

    F- > O2- > F > 0

    (c)

    O2- > F- > O > F

    (d)

    O2 > F- > F> O

  86. Which of the following atom has the lowest ionization enthalpy?

    (a)

    1s2 2s2 2p3

    (b)

    1s2 2s2 2p6 3s1

    (c)

    Is2 2s2 2p6

    (d)

    Is2 2s2 2p5

  87. Which of the following statement is incorrect?

    (a)

    The ionization potential of nitrogen is greater than that of oxygen

    (b)

    The electron affinity of F is greater than that of Cl.

    (c)

    The ionization potential of Mg is greater than aluminium.

    (d)

    The electronegativity of F is greater than that of Cl.

  88. Correct order of 1st ionization potential among elements Be, B, C, N, O is

    (a)

    B < Be < C< O < N

    (b)

    B < Be < C< N < O

    (c)

    Be < B < C< N < O

    (d)

    Be < B < C< O < N

  89. Ionic radii are

    (a)

    Inversely proportional to effective nuclear charge

    (b)

    Inversely proportional to square of effective nuclear charge

    (c)

    Directly proportional effective nuclear charge

    (d)

    Directly proportional to square of effective nuclear charge.

  90. Which of the following sets contain only isoelectionic ions?

    (a)

    Zn2+, Ca2+, Ga3+, Al3+

    (b)

    K+, Ca2+, Sc3+, Cl-

    (c)

    P3-, S2-, Cl-, Al3+

    (d)

    Ti4+, Ar, Cr3+, V5+

  91. Which orbital diagram gives an insight to the highest ionization energy?

    (a)

    (b)

    (c)

    (d)

  92. Pick the incorrect statement about the factors affecting ionization energy

    (a)

    More is the shielding of valence electrons more is the ionization energy

    (b)

    Ionization enthalpy ∝ effective nuclear charge

    (c)

    Half filled or full filled atomic orbitals have high ionization energy

    (d)

    Larger is the atomic radii lower is ionization energy

  93. Element with atomic number 56 belongs to which block

    (a)

    s

    (b)

    p

    (c)

    d

    (d)

    f

  94. Gadolinium belong to '4f series.Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

    (a)

    [Xe]4f95s1

    (b)

    [Xe]4f75d16s2

    (c)

    [Xe]4f65d26s2

    (d)

    [Xe]4f8d2

  95. The number of d- electrons in Fe+2 (Z = 26) is not equal to the number of electrons in which one of the following?

    (a)

    d-electron in Fe (Z = 26)

    (b)

    p-electron in Ne (Z = 10)

    (c)

    s-electron in Mg (Z = 12)

    (d)

    p-electron in CI (Z = 17)

  96. Among the elements Ca, Mg, P and CI the order of increasing atomic radii is:

    (a)

    Mg < Ca < Cl < P

    (b)

    Cl < P < Mg < Ca

    (c)

    p < Cl < Ca < Mg

    (d)

    Ca < mg < P < Cl

  97. The ionic radii (in A) of N-3, 0-2 and P- are respectively:

    (a)

    1.71, 1.40 and 1.36

    (b)

    1.71, 1.36 and 1.40

    (c)

    1.36, 1.40 and 1.71

    (d)

    1.36, 1.71 and 1.40

  98. Among the following which one has highest cation to anion ratio?

    (a)

    CsI

    (b)

    CsF

    (c)

    LiF

    (d)

    NaF

  99. The ionisation potential of Na is 5.48 eV. The ionisation potential of K will be

    (a)

    tho same as Na

    (b)

    4.34 eV

    (c)

    5.68 eV

    (d)

    10.88 eV

  100. The first ionisation potential (in eV) of Be and B respectively are:

    (a)

    8.29,9.32

    (b)

    9.32, 8.29

    (c)

    9.32, 9.32

    (d)

    8.29, 8.29

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