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MCQ for Full Syllabus Chemistry Classification Of Elements and Periodicity In Properties
Full Syllabus Chemistry students should refer to the following multiple-choice questions with answers for Classification Of Elements and Periodicity In Properties in Full Syllabus.
Classification Of Elements and Periodicity In Properties MCQ Questions Full Syllabus Chemistry with Answers
Question: Modern periodic table is based on the atomic number of the elements. The experiment which proved the significance of the atomic number was
- a) Mosley’s work on X-ray spectra
- b) Mulliken’s oil drop experiment
- c) Bragg’s work on X-ray diffraction
- d) Discovery of X-rays by Rontgen
Answer: Mosley’s work on X-ray spectra
Question: The period number in the periodic table corresponds to the ...A... principal quantum number (n) of the elements. Here, A refers to
- a) highest
- b) None of these
- c) lowest
- d) middle
Answer: highest
Question: The symbol and IUPAC name for the element with atomic number 120, respectively are
- a) Ubn and unbinilium
- b) Ubn and unnibium
- c) Ubn and unbiunium
- d) Ubn and unnilium
Answer: Ubn and unbinilium
Question: Element with which of the following atomic number was named by American Society as Rutherfordium, while by Soviet Society it was named as Kurchatovium?
- a) 104
- b) 110
- c) 108
- d) 114
Answer: 104
Question: What is the IUPAC name of the element with atomic number 114 ?
- a) Ununquadium
- b) Unununnium
- c) Unnilquadium
- d) Unnilennium
Answer: Ununquadium
Question:
- a) 5th
- b) 7th
- c) 2nd
- d) 3rd
Answer: 5th
Question: The long form of periodic table consists of
- a) seven periods and eighteen groups
- b) seven periods and eight groups
- c) eight periods and eighteen groups
- d) eighteen periods and eight groups
Answer: seven periods and eighteen groups
Question: All the members in a group in long form of periodic table have the same
- a) All of the above
- b) chemical properties
- c) number of valence electrons
- d) valence
Answer: All of the above
Question: Elements of which group form anions most readily?
- a) Halogens
- b) Oxygen family
- c) Nitrogen family
- d) Alkali metals
Answer: Halogens
Question: Element having atomic no. of 56 belongs to which of the following block of periodic table?
- a) s-block
- b) d-block
- c) p- block
- d) f- block
Answer: s-block
Question: In the modern periodic table one of the following does not have appropriate position
- a) inner transition elements
- b) halogens
- c) inert gases
- d) transition elements
Answer: inner transition elements
Question: If the atomic number of an element is 33, it will be placed in the periodic table in the
- a) Fifth group
- b) First group
- c) Third group
- d) Seventh group
Answer: Fifth group
More Questions..................................
Question: An atom has electronic configuration 1s2 2s2 2p6 3s2 3p6 3d3 4s2, you will place it in which group?
- a) Fifth
- b) Second
- c) Fifteenth
- d) Third
Answer: Fifth
Question: Which of the following is not an actinoid ?
- a) Terbium (Z = 65)
- b) Curium (Z = 96)
- c) Californium (Z = 98)
- d) Uranium (Z = 92)
Answer: Terbium (Z = 65)
Question: The period number in the long form of the periodic table is equal to
- a) maximum Principal quantum number of any element of the period.
- b) atomic number of any element of the period.
- c) magnetic quantum number of any element of the period
- d) maximum Azimuthal quantum number of any element of the period.
Answer: maximum Principal quantum number of any element of the period.
Question: The electronic configuration of four elements are given below. Which elements does not belong to the same family as others?
- a)
- b)
- c)
- d)
Answer:
Question: The elements with atomic numbers 9, 17, 35, 53 and 85 belong to
- a) halogens
- b) alkali metals
- c) alkaline earth metals
- d) noble gases
Answer: halogens
Question: Which of the following pairs has both members from the same period of the periodic table
- a) Na – Cl
- b) Cl – Br
- c) Ca – Cl
- d) Na – Ca
Answer: Na – Cl
Question: The elements which are characterized by the outer electronic configuration ns1 to ns2 np6 are collectively called
- a) Representative elements
- b) Transition elements
- c) Lanthanides
- d) Inner transition elements
Answer: Representative elements
Question: f-block elements are called inner transition elements because
- a) they exist in between transition elements
- b) they have properties similar to those of transition elements
- c) the last electron enters into the f-orbital of the penultimate shell
- d) the last electron enters into any orbital of penultimate shell
Answer: they exist in between transition elements
Question: An element, which belongs to third period and group 16 in the periodic table has electronic configuration.
- a)
- b)
- c) Both
- d) None of these
Answer:
Question: Which of the following is non-metallic ?
- a) B
- b) Mg
- c) Be
- d) Al
Answer: B
Question: Which group of the periodic table contains coinage metal ?
- a) IB
- b) None of these
- c) IIA
- d) IA
Answer: IB
Question: The only non-metal which is liquid at ordinary temperature is
- a) Br2
- b) None of these
- c) Hg
- d) NH3
Answer: Br2
Question: Which is a metalloid?
- a) Sb
- b) Zn
- c) Pb
- d) Bi
Answer: Sb
Question: In the long form of the periodic table all the non-metals are placed in
- a)
- b)
- c)
- d) All of these
Answer:
Question: Arrange the following elements in the order of their increasing non-metallic character
Li, O, C, Be, F
- a) Li < Be < C < O< F
- b) F < O < Be < C < Li
- c) F < O < C < Be < Li
- d) F < O < C < Be < Li
Answer: Li < Be < C < O< F
Question: Which is the correct order of ionic sizes (At. No. : Ce = 58, Sn = 50, Yb = 70 and Lu = 71) ?
- a) Sn > Ce > Yb > Lu
- b) Sn > Yb > Ce > Lu
- c) Ce > Sn > Yb > Lu
- d) Lu > Yb > Sn > Ce
Answer: Sn > Ce > Yb > Lu
Question: The order of increasing sizes of atomic radii among the elements O, S, Se and As is
- a) O < S < As < Se
- b) As < S < O < Se
- c) Se < S < As < O
- d) O < S < Se < As
Answer: O < S < As < Se
Question: In the ions P3–, S2– and Cl–, the increasing order of size is
- a)
- b)
- c)
- d) All of these
Answer:
Question: Which of the following is correct ?
- a) Isoelectronic ions have same number of electrons
- b) All are correct
- c) Isoelectronic ions have same neutrons
- d) Isoelectronic ions have same nuclear charge
Answer: Isoelectronic ions have same number of electrons
Question: On going down a main sub-group in the periodic table (example Li to Cs in IA or Be to Ra in IIA), the expected trend of changes in atomic radius is a
- a) continuous increase
- b) continuous decrease
- c) periodic one, an increase followed by a decrease
- d) decrease followed by increase
Answer: continuous increase
Question: Why the size of an anion is larger than the parent atom?
- a) Both
- b) Due to decrease in effective nuclear charge
- c) Due to increased repulsion among the electrons
- d) None of these
Answer: Both
Question: Which ionisation potential (IP) in the following equations involves the greatest amount of energy ?
- a)
- b)
- c)
- d)
Answer:
Question: Arrange S, P, As in order of increasing ionisation energy
- a) As < S < P
- b) S < P < As
- c) P < S < As
- d) As < P < S
Answer: As < S < P
Question: The statement that is not correct for periodic classification of elements is :
- a) For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals
- b) Non-metallic elements are less in number than metallic elements.
- c) The properties of elements are periodic function of their atomic numbers
- d) The first ionisation enthalpies of elements generally increase with increase in atomic number as we go along a period.
Answer: For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals
Question:
- a)
- b)
- c) Both
- d) None of these
Answer:
Question: Of the given electronic configurations for the elements, which electronic configuration indicates that there will be abnormally high difference in the second and third ionization energy for the element?
- a) 1s2 2s2 2p6 3s2
- b) 1s2 2s2 2p6 3s1
- c) 1s2 2s2 2p6 3s2 3p2
- d) None of these
Answer: 1s2 2s2 2p6 3s2
Question: Alkali metals are powerful reducing agents because
- a) their ionisation potential is low
- b) these are monovalent
- c) their ionic radii are large
- d) these are metals
Answer: their ionisation potential is low
Question: Which of the following metals requires the radiation of highest frequency to cause the emission of electrons ?
- a) Mg
- b) Ca
- c) Na
- d) K
Answer: Mg
Question: Halogens and chalcogens family have highly ...P.. electron gain enthalpy. Here, P refers to
- a) negative
- b) positive
- c) infinity
- d) zero
Answer: negative
Question: Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl ?
- a) O < S < F < Cl
- b) S < O < Cl < F
- c) Cl < F < O < S
- d) F < S < O < Cl
Answer: O < S < F < Cl
Question: The electron affinity for the inert gases is –
- a) zero
- b) negative
- c) high
- d) positive
Answer: zero
Question: The element with positive electron gain enthalpy is
- a) neon
- b) sodium
- c) hydrogen
- d) oxygen
Answer: neon
Question: Which of the following will have the least negative electron gain enthalpy?
- a) P
- b) Cl
- c) S
- d) F
Answer: P
Question: Which is the correct order of electronegativity ?
- a) F > N < O > C
- b) F > N > O < C
- c) F > N > O > C
- d) F < N < O =C
Answer: F > N < O > C
Question: The correct order of decreasing electronegativity values among the elements I-beryllium, II-oxygen, III-nitrogen and V-magnesium is
- a) II > III > I > IV
- b) I > II > III > IV
- c) I > II > III > IV
- d) I > II > IV > III
Answer: II > III > I > IV
Question:
- a) Neutral oxide
- b) Basic oxide
- c) Acidic oxide
- d) Amphoteric oxide
Answer: Neutral oxide
Question: Diagonal relationship is shown by
- a) None of the above
- b) Most of the elements of second period
- c) All 3d series elements
- d) All elements with their diagonally downward elements towards right
Answer: None of the above
Question: In any period the valency of an element with respect to oxygen
- a) Increases one by one from IA to IVA and then decreases from VA to VIIA one by one
- b) Decreases one by one from IA to IVA and then increases from VA to VIIA one by one
- c) Decreases one by one form IA to VIIA
- d) Increases one by one from IA to VIIA
Answer: Increases one by one from IA to IVA and then decreases from VA to VIIA one by one
Question: What will be the formula of the compound formed by the silicon and bromine ?
- a)
- b)
- c)
- d)
Answer:
Question: Which of the following sequence correctly represents the decreasing acidic nature of oxides ?
- a)
- b)
- c)
- d) All of these
Answer:
Question: Choose the correct coding for following statements. Here T stands for True and F stands for False statement.
(i) Mendeleev left several gaps in his periodic table for the undiscovered elements.
(ii) The gap under aluminium and a gap under silicon was left and these elements were called Eka aluminium and Eka silicon.
(iii) Germanium was placed in place of Eka-aluminium and gallium was placed in place of Eka silicon.
- a) TTF
- b) TTT
- c) TFF
- d) TFT
Answer: TTF
Question: 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), (ii) and (iii)
- b) (iv) only
- c) (i) only
- d) (i), (ii) and (iv)
Answer: (i), (ii) and (iii)
Question: Consider the following statements:
(i) The discovery of inert gases later on did not disturb Mendeleev's arrangement.
(ii) In the present periodic table, periodicity in the properties of elements is related to the periodicity in their electronic configurations.
Which of these statement(s) is/are correct ?
- a) Both (i) and (ii)
- b) (i) only
- c) (ii) only
- d) Neither (i) nor (ii)
Answer: Both (i) and (ii)
Question:
- a) (i), (ii) and (iv)
- b) (i), (ii) and (iii)
- c) (i) and (ii)
- d) (iii) and (iv)
Answer: (i), (ii) and (iv)
Question: With reference to the chemical element with atomic number 17, consider the following statements:
(i) It belongs to second period in the periodic table of chemical elements.
(ii) It forms anion with unit negative charge.
Which of the statement(s) given above is/are correct ?
- a) (ii) only
- b) Neither (i) nor (ii)
- c) (i) only
- d) Both (i) and (ii)
Answer: (ii) only
Question: Choose the correct codes for the following statements related to s-block elements. Here ‘T’ stands for true and F stands for false statement.
(i) They are all reactive metals with low ionization enthalpies.
(ii) Their metallic character and reactivity increase as we go down the group.
(iii) They are found in pure form in nature.
(iv) All the compounds of s-block elements are ionic in nature.
- a) TTFF
- b) TTTF
- c) TTFT
- d) TFFF
Answer: TTFF
Question: Consider the following statements:
(i) The elements silicon, germanium and arsenic are called metalloids.
(ii) Metalloids have properties quite different from those of metals and non-metals.
Which of these statement(s) is/are correct ?
- a) Both (i) and (ii)
- b) (i) only
- c) (ii) only
- d) Neither (i) nor (ii)
Answer: Both (i) and (ii)
Question: Periodic classification of elements is used to examine the
- a) Both
- b) periodic trends in chemical properties of elements
- c) periodic trends in physical properties of elements
- d) None of these
Answer: Both
Question: Cl, Br, I, if this is Dobereiner’s triad and the atomic masses of Cl and I are 35.5 and 127 respectively the atomic mass of Br is
- a) 81.25
- b) 162.5
- c) 91.5
- d) 45.625
Answer: 81.25
Question: If the two members of a Dobereiner triad are phosphorus and antimony, the third member of this triad is
- a) arsenic
- b) iodine
- c) sulphur
- d) calcium
Answer: arsenic
Question: The law of triads is applicable to a group of
- a) Cl, Br, I
- b) Na, K, Rb
- c) C, N, O
- d) H, O, N
Answer: Cl, Br, I
Question: In 1800, only ....X.... elements were known. Here, X refers to
- a) 31
- b) 92
- c) 63
- d) 114
Answer: 31
Question: Johann Doberiner gave the idea of trends among physical and ...X... of several groups of three elements. Here, X refers to
- a) chemical properties
- b) atomic number
- c) atomic mass
- d) None of these
Answer: chemical properties
Question: Which of the following is the correct set of elements to Dobereiner’s triads ?
- a)
- b)
- c)
- d) Data insufficient
Answer:
Question: On which of the following Dobereiner’s Triad law is not applicable?
- a) F, Cl, Br
- b) Cl, Br, I
- c) Ca, Sr, B
- d) Li, Na, K
Answer: F, Cl, Br
Question: Newlands could classify elements only upto
- a) calcium
- b) copper
- c) chlorine
- d) chromium
Answer: calcium
Question: According to Newlands theory, when elements are arranged in the order of increasing atomic weight which number element had similar properties to the first element
- a) eighth
- b) third
- c) seventh
- d) sixth
Answer: eighth
Question: Lothar Meyer plotted the physical properties such as atomic volume, melting point and ...X... against atomic weight. Here, X refers to
- a) boiling point
- b) mass
- c) None of these
- d) surface tension
Answer: boiling point
Question: The most significant contribution towards the development of periodic table was made by
- a) Mendeleev
- b) Dalton
- c) Avogadro
- d) Cavendish
Answer: Mendeleev
Question: Noble gases were included in Mendeleev’s periodic table in the
- a) None of these
- b) 7th group
- c) 1st group
- d) 8th group
Answer: None of these
Question: Mendeleev classified elements in
- a) seven periods and nine groups
- b) eight periods and seven groups
- c) eight periods and eight groups
- d) increasing order of atomic groups
Answer: seven periods and nine groups
Question: Select the correct chronological order for the discoveries of the following scientists.
Dobereiner, Newlands, Chancourtois, Mendeleev
- a) Dobereiner, Chancourtois, Newlands, Mendeleev
- b) Chancourtois, Dobereiner, Newlands, Mendeleev
- c) Dobereiner, Newlands, Chancourtois, Mendeleev
- d) Chancourtois, Newlands, Dobereiner, Mendeleev
Answer: Dobereiner, Chancourtois, Newlands, Mendeleev
Question: The molecular formula of chloride of Eka-Aluminium and Eka-Silicon respectively are
- a)
- b)
- c)
- d)
Answer:
Question: Who developed long form of the periodic table?
- a) Neils Bohr
- b) Moseley
- c) Mendeleev
- d) Lothar Meyer
Answer: Neils Bohr
Question: At present, how many elements are known
- a) 118
- b) 112
- c) 110
- d) 113
Answer: 118
Question: Which of the scientists given below discovered that periodic table should be based on the atomic number ?
- a) Moseley
- b) Mendeleev
- c) Newlands
- d) Lothar Meyer
Answer: Moseley
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