Periodic Classification of Elements and Periodicity in Properties | India Study Solution

Periodic Classification of Elements and Periodicity in Properties

Solved Questions Bank and MCQ Test Series – Set 4 (Q. No 31-40)

Fully solved practice questions (MCQ Test Series) for on Classification of Elements, Periodic Table and Periodicity in Properties for IIT JEE, NEET, Class 12 Board Exams and other competitions.

Chemistry Test Series: Periodic Classification of Elements and Periodicity in Properties

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India Study Solution Test Series – Set 4 (Q. No. 31-40)

Question 31: In which of the following compound Mn shows minimum radius?

a. MnO₂    b. KMnO₄    c. MnO   d. None of these

Question 32: The values of IE(I), IE(II), IE(III), and IE(IV), of an atom are respectively 7.5 eV, 25.6 eV, 48.6 eV and 170.6 eV. The electronic configuration of the atom will be:

a. 1s², 2s², 2p⁶, 3s¹          b. 1s², 2s², 2p⁶, 3s², 3p¹

c. 1s², 2s², 2p⁶, 3s², 3p³    d. 1s², 2s², 2p⁶, 3s²

Question 33: The total number of elements known are:

a. 92    b. 117    c. 100    d. 118

Question 34: With which of the following electronic configuration an atom has the lowest ionization enthalpy?

a. 1s², 2s², 2p³   b.1s², 2s², 2p⁵, 3s¹

c. 1s², 2s², 2p⁶     d. 1s², 2s², 2p⁵

Question 35: The longest and shortest periods are

a. 1 & 6    b. 2 & 6    c. 6 & 1    d. 1 & 7

Question 36: Pick the incorrect statement about the factors affecting ionization energy

a. Half-filled or full-filled atomic orbitals have high ionization energy

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

c. Larger is the atomic radii lower is ionization energy

d. Ionization enthalpy  effective nuclear charge

Question 37: Which of the following statements is INCORRECT?

a. Generally the radius trend and the ionization energy trend across a period are opposites

b. Metallic and covalent radii of potassium are 2.3 Å and 2.03 Å respectively

c. Amongst Li^-, Be^-, B^- and C^-, Li^- is least stable ion

d. Atomic and ionic radii of Niobium and Tantalum are almost same

Question 38: Which of the following has largest radius?

a. O^2-   b. Mg²⁺   c. Na⁺   d. F^-

Question 39: Among the following Ca, Mg, P and Cl, 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

Question 40: The starting element of fifth period is

a. K   b. Rb   c. Kr   d. Xe

Periodic Classification of Elements and Periodicity in Properties

Hint & Solutions of Test Series Questions Set 4 (Q. No. 31 - 40)

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Answer 31: (b) (Hint: IAs oxidation state of central metal ion increases, the electron to proton ratio decreases and therefore, size of ion decreases. In KMnO₄, Mn is in + 7 O.S. So, due to maximum +ve charge radius will be lowest)

Answer 32: (b) Answer 33: (b) Answer 34: (b) Answer 35: (c) Answer 36: (b)

Answer 37: (c)

[Hint: a. Across the period, size decreases as electrons are added in the same shell and nuclear charge increases by one unit for addition of each successive element. In contrary, the ionization energy increases as size of atom decreases and nuclear charge increases. 

b. r_metallic > r_covalent (covalent bond formation involves the overlapping of orbitals). 

c. ₃Li^- - 1s² 2s² completely filled stable configuration, so more stable. ₄Be^- - 1s² 2s² 2p¹. ₅B^- - 1s² 2s² 2p². ₆C^- - 1s² 2s² 2p³ half-filled stable configuration, so more stable.

d. Due to lanthanide contraction]

Answer 38: (a)  Answer 39: (b)  Answer 40: (b)

 Classification of Elements, Periodic Table - Practice Questions Bank | Test Series  

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Classification of Elements, Periodic Table and Periodicity in Properties - Solved MCQ Test Series for NEET-ug, IITJEE, AIPMT and all Entrance Exams, Admission Tests

Classification of Elements, Periodic Table and Periodicity in Properties

Solved Practice Questions and MCQ Test Series – Set 3 (Q.No 21-30)

Fully solved practice questions (MCQ Test Series) for study and exam-preparation of all Medical and Dental Entrance Exams, Engineering Entrance Exams; JEE, Admission Tests and other competitions.

Syllabus / Randomly selected Topics:

Genesis of Periodic Classification, Earlier Attempts of Classification of Elements, Mendeleev’s Periodic Law and Original Periodic Table, Modern Periodic Law and Long Form of Periodic Table, (Modified Form of Mendeleev’s Periodic Table), Naming the Elements, Periodic Table of Elements (Long Form representing Electron Configurations), Position of an Element on the Basis of Electronic Configuration, Nomenclature of Elements with Atomic Number > 100, Electronic Configurations of Elements and the Periodic Table, Periodic Trends in Properties of Elements or Atomic Properties or Periodic Properties of Elements, The Screening Effects or Shielding Effect, Effective Nuclear Charge, Ionisation Enthalpy or Ionisation Potential, Atomic Radii, Ionic Radii, Ionization Enthalpy, Electron Gain Enthalpy, Electron Affinity, Electronegativity, Valence, Electronic Configurations and Types of Elements: s, p, f-Blocks

Chemistry: Classification of Elements, Periodic Table and Periodicity in Properties

Fully Solved Multiple Choice Questions  – Set 3 (Q. No. 21-30)

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Question 21: An element of atomic mass 40 has 2, 8, 8, 2 as the electronic configuration. Which one of the following statements regarding this element is not correct?

a. It forms an amphoteric oxide     b. It belongs to IIA group

c. It belongs to IV period   d. It has 20 neutrons

Question 22: Which of the following has the greatest electron affinity?

a. I b. Br   c. F    d.Cl

Question 23: The triad not present in Group VII of Mendeleev’s table

a. Li, Na, K b. Fe, Co, Ni  c. Ru, Rh, Pd    d. Os, Ir, Pt

Question 24: Correct order of radii

 a. Na > Mg > Al   b. Na⁺ > Mg²⁺ > Al³⁺

c. I⁺ < I < I^-  d. All of these

Question 25: If ionisation energy of an atom is 10 eV & EA is 6.8 eV electronegativity of the species on Pauling scale.

a. 4   b. 3   c. 2   d. 1

Question 26: The first ionisation energy will be maximum for:

a. Be   b. He   c. Li   d. Fe

Question 27: The first ionisation enthalpies of four consecutive elements present in the second period of the periodic table are 8.3, 11.3, 14.5 and 13.6 eV respectively. Which one of the following is the first ionisation enthalpy of nitrogen?

a. 13.6   b. 14.5   c. 11.3   d. 8.3

Question 28: Correct order of 1 ionisation potential among following 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

Question 29: One of the following groups is not found in the Mendeleev’s periodic table

a. Zero b. I   c. VII   d. VIII

Question 30: Which pair of elements has the same characteristic chemical properties?

a. Z = 13, Z = 22   b. Z = 3, Z = 11

c. Z = 4, Z = 24     d. Z = 2, Z = 4

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• Classification of Elements, Periodic Table, Periodicity in Properties - MCQ Test Series for all Medical, Engineering Entrance Exams and Admission Tests
• Chemistry: Prepare and practice online for Medical, Engineering JEE - Classification of Elements, Periodic Table, Periodicity in Properties

Classification of Elements, Periodic Table and Periodicity in Properties

Hint & Solutions of Test Series Questions Set 3 (Q. No. 21 - 30)

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Answer 21: (a) Answer 22: (d) Answer 23: (a) Answer 24: (d)

Answer 25: (b)

Answer 26: (b) Answer 27: (b) Answer 28: (a) Answer 29: (a) Answer 30: (b)

 Classification of Elements and Periodic Table - Chemistry Practice Questions  

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Chemistry Practice Questions: Classification of Elements, Periodic Table and Periodicity in Properties (Syllabus)

Genesis of Periodic Classification, Earlier Attempts of Classification of Elements, Mendeleev’s Periodic Law and Original Periodic Table, Modern Periodic Law and Long Form of Periodic Table, (Modified Form of Mendeleev’s Periodic Table), Naming the Elements, Periodic Table of Elements (Long Form representing Electron Configurations), Position of an Element on the Basis of Electronic Configuration, Nomenclature of Elements with Atomic Number > 100, Electronic Configurations of Elements and the Periodic Table, Periodic Trends in Properties of Elements or Atomic Properties or Periodic Properties of Elements, The Screening Effects or Shielding Effect, Effective Nuclear Charge, Ionisation Enthalpy or Ionisation Potential, Atomic Radii, Ionic Radii, Ionization Enthalpy, Electron Gain Enthalpy, Electron Affinity, Electronegativity, Valence, Electronic Configurations and Types of Elements: s, p, f-Blocks

Chemistry: Classification of Elements, Periodic Table and Periodicity in Properties

Multiple Choice Questions (MCQs) – Set 2 (Q. No. 11-20)

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Question 11: Rare earths are generally

a. Actinides                            b. f-Block elements 

c. Inner transition elements   d. Lanthanides

Question 12: Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?

a. Ne [3s² 3p¹]        b. Ne [3s² 3p³]  

c. Ne [3s² 3p²]        d. Ar [3d¹⁰ 4s² 4p³]

Question 13: The ionisation energy will be higher when the electron is removed from _____ if other factors being equal.

a. s-orbital   b. p-orbital   c. d-orbital   d. f-orbital

Question 14: The elements with atomic numbers 10, 18, 36, 54 and 86 are all:

a. light metals   b. inert gases   c. halogens   d. rare-earths

Question 15: The starting element and last element in the largest period in modern periodic table are

a. Rb and Xe   b. Cs and I   c. Cs and Rn   d. Fr and Kr

Question 16: The first, second and third ionisation energies of Al are 578, 1817 and 2745 kJ mol^- respectively. Calculate the energy required to convert all the atoms of Al to Al⁺³ present in 270 mg of Al vapours

a. 5140 kJ   b. 51.40 kJ   c. 2745 kJ   d. 514.0 kJ

Question 17: The set representing the correct order of first ionisation potential is:

a. K > Na > Li      b. Be > Mg > Ca  

c. B > C > N        d. Ge > Si > C 

Question 18: Which among the following element have lowest value of first ionization energy?

a. Pb   b. Sn   c. Si   d. C

Question 19: Which one of the following oxides is neutral?

a. CO     b. SnO₂     c. ZnO     d. SiO₂

Question 20: The correct order of the metallic character is:

a. Na > Mg > Al > Si        b. Mg > Na > Al > Si

c. Al > Mg > Na > Si        d. Si > Al > Na > Mg

Classification of Elements, Periodic Table and Periodicity in Properties

Solutions of Practice Questions Set 2 (Q. No. 11 - 20)

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Answer 11: (d)   Answer 12: (b)   Answer 13: (a)   Answer 14: (b)   Answer 15:(c)   Answer 16:(b)     Answer 17: (b) Hint: Down the group the effective nuclear charge remains almost constant. But down the group with increasing atomic number the number of atomic orbits increases and there by atomic size increases. As a result, the distance of valence shell electron from nucleus increases and attraction between them decreases and therefore ionization energy decreases.

Answer 18: (b)   Answer 19: (a) Hint: CO is neutral towards litmus. SnO₂ and ZnO are amphoteric as they form salts and water with acids and bases. SiO₂ is acidic as it forms salts with bases.

SiO₂ + 2NaOH → Na₂SiO₃ + H₂O.

Answer 20: (a) Hint: The metallic character of the elements is highest at the extremely left (low ionisation energies) and then decreases across the period from left to right (ionisation energies increases across the period)

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Classification of Elements, Periodic Table and Periodicity in Properties (Syllabus):

Genesis of Periodic Classification, Earlier Attempts of Classification of Elements, Mendeleev’s Periodic Law and Original Periodic Table, Modern Periodic Law and Long Form of Periodic Table, (Modified Form of Mendeleev’s Periodic Table), Naming the Elements, Periodic Table of Elements (Long Form representing Electron Configurations), Position of an Element on the Basis of Electronic Configuration, Nomenclature of Elements with Atomic Number > 100, Electronic Configurations of Elements and the Periodic Table, Periodic Trends in Properties of Elements or Atomic Properties or Periodic Properties of Elements, The Screening Effects or Shielding Effect, Effective Nuclear Charge, Ionisation Enthalpy or Ionisation Potential, Atomic Radii, Ionic Radii, Ionization Enthalpy, Electron Gain Enthalpy, Electron Affinity, Electronegativity, Valence, Electronic Configurations and Types of Elements: s, p, f-Blocks

Classification of Elements, Periodic Table and Periodicity in Properties

Fully Solved Practice Questions - MCQ Test Series (Set-1 : Q.No 1-10)

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Question 1: An element ‘X’ with atomic number 114 has recently been discovered. Its IUPAC name is:

a. Eka-lead    b. Ununfortium    c. Ununquadium     d. Bohrium

Question 2: The maximum number of elements available in elemental form

a. 26   b. 92    c.111     d. 118

Question 3: Which of the following ion is the largest in size?

a. K⁺    b. Ca²⁺   c. Cl^-    d. S^-2

Question 4: Element with electronic configuration as [Ar]¹⁸ 3d⁵ 4s² is placed in:

a. 1^st group, s-block       b. 2^nd group, s-block  

c. 5^th group, d-block      d. 7^th group, d-block

Question 5: The atom larger in size as compared to oxygen is:

a. F    b. He   c. Ne    d. None of these.

Question 6: In the long form of periodic table, the number of period indicates the value of:

a. Atomic number                    b. Atomic mass 

c. Principal quantum number  d. Azimuthal quantum number

Question 7: First periodic table was drafted by

a. Mosely     b. Newlands    c. Dobereiner   d. Mendeleev

Question 8: Which one of the following is correct order of the size of iodine species?

a. I⁺  > I^-  > I          b. I^- > I > I⁺    

c. I > I^- > I⁺            d. I > I⁺ > I^-

Question 9: Among Cl^- , F^- , Br^- and I^-  the correct order of increasing atomic radii is:

a. I^- > F^- > Cl^- > Br^-     b. I^- > Br^- > Cl^- > F^-   

c. F^- > Br^- > Cl^- > I^-     d. F^- > Cl^- > Br^- > I^-

Question 10: Ce (58) is a member of :

a. s-block   b. p-block  

c. d-block   d. f-block

Classification of Elements, Periodic Table and Periodicity in Properties

Solutions of Practice Questions Set 1 (No. 1 - 10)

Answer 1: (c) Hint: Un – un – quad – ium

                                1      1       4

Answer 2: (b)    Answer 3: (d)

Answer 4: (d) Last electrons enter in d-orbital. So, it belongs to d-block. For d-block elements the group number is equal to the number of valence electrons + number of electrons in (n – 1) d sub shell i.e., 2 + 5 =7^th group.

Answer 5: (c)  Answer 6: (c) [Hint: The serial number of the period indicates the principal quantum number (n) which is the value of the valence shell of the atoms of the elements present in that period.]

Answer 7: (d)  Answer 8: (b)  Answer 9: (b)  Answer 10: (d)

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