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## Periodic Table & Periodicity

### Chemistry

#### Previous Years Questions

More
Given two statements below : Statement I : In $$\mathrm{Cl}_{2}$$ molecule the covalent radius is double of the atomic r...
JEE Main 2022 (Online) 26th July Morning Shift
The first ionization enthalpies of Be, B, N and O follow the order
JEE Main 2022 (Online) 25th July Evening Shift
The IUPAC nomenclature of an element with electronic configuration [Rn] $$5 \mathrm{f}^{14} 6 \mathrm{d}^{1} 7 \mathrm{s... JEE Main 2022 (Online) 25th July Morning Shift The correct order of electron gain enthalpy ($$-$$ve value) is : JEE Main 2022 (Online) 30th June Morning Shift The correct order of electron gain enthalpies of Cl, F, Te and Po is JEE Main 2022 (Online) 25th June Evening Shift Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)... JEE Main 2022 (Online) 27th June Morning Shift The correct order of increasing ionic radii is JEE Main 2022 (Online) 27th June Evening Shift Element "E" belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of the ... JEE Main 2022 (Online) 28th June Morning Shift Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The ... JEE Main 2022 (Online) 29th June Evening Shift The electronic configuration of Pt (atomic number 78) is: JEE Main 2022 (Online) 29th June Morning Shift Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d5 : JEE Main 2021 (Online) 1st September Evening Shift Match List - I with List - II : List - I(Metal Ion) List - II(Group of Qualitative analysis) ... JEE Main 2021 (Online) 31st August Evening Shift The Eu2+ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic numb... JEE Main 2021 (Online) 31st August Evening Shift Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) ... JEE Main 2021 (Online) 31st August Morning Shift Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature ? (Given Z for Nd = 60, Yb = ... JEE Main 2021 (Online) 31st August Morning Shift Which one of the following is used to remove most of plutonium from spent nuclear fuel? JEE Main 2021 (Online) 27th August Evening Shift The correct order of ionic radii for the ions, P3$$-$$, S2$$-$$, Ca2+, K+, Cl$$-$$is :... JEE Main 2021 (Online) 27th August Evening Shift Choose the correct statement from the following : JEE Main 2021 (Online) 27th August Evening Shift In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected? JEE Main 2021 (Online) 27th August Morning Shift Chalcogen group elements are : JEE Main 2021 (Online) 26th August Evening Shift Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) ... JEE Main 2021 (Online) 26th August Evening Shift The correct order of first ionisation enthalpy is : JEE Main 2021 (Online) 27th July Evening Shift The ionic radii of F$$-$$and O2$$-$$respectively are 1.33$$\mathop A\limits^o $$and 1.4$$\mathop A\limits^o $$, while... JEE Main 2021 (Online) 25th July Evening Shift The ionic radii of K+, Na+, Al3+ and Mg2+ are in the order: JEE Main 2021 (Online) 25th July Morning Shift The set having ions which are coloured and paramagnetic both is - JEE Main 2021 (Online) 22th July Evening Shift Which one of the following statements for D.I. Mendeleeff, is incorrect? JEE Main 2021 (Online) 22th July Evening Shift The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. ... JEE Main 2021 (Online) 18th March Evening Shift The common positive oxidation states for an element with atomic number 24, are : JEE Main 2021 (Online) 17th March Evening Shift The absolute value of the electron gain enthalpy of halogens satisfies : JEE Main 2021 (Online) 17th March Morning Shift Identify the elements X and Y using the ionisation energy values given below : Ionization energy (kJ/mol) ... JEE Main 2021 (Online) 16th March Evening Shift The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are : JEE Main 2021 (Online) 16th March Evening Shift Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :Assertion A : Size... JEE Main 2021 (Online) 16th March Morning Shift The correct order of electron gain enthalpy is : JEE Main 2021 (Online) 26th February Evening Shift Match List - I with List - II. List I Electronic configuration List II$${\Delta _i}H$$in kJ$$mo...
JEE Main 2021 (Online) 26th February Morning Shift
The correct order of bond dissociation enthalpy of halogens is :
JEE Main 2021 (Online) 25th February Evening Shift
What is the correct order of the following elements with respect to their density?
JEE Main 2021 (Online) 24th February Evening Slot
Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :
JEE Main 2021 (Online) 24th February Morning Slot
The correct order of the ionic radii of O2–, N3–, F– , Mg2+, Na+ and Al3+ is :...
JEE Main 2020 (Online) 5th September Evening Slot
The incorrect statement(s) among (a) - (c) is (are) (a) W(VI) is more stable than Cr(VI). (b) In the presence of HCl, pe...
JEE Main 2020 (Online) 4th September Evening Slot
The ionic radii of O2–, F–, Na+ and Mg2+ are in the order :
JEE Main 2020 (Online) 4th September Morning Slot
The elements with atomic numbers 101 and 104 belong to, respectively :
JEE Main 2020 (Online) 4th September Morning Slot
The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol–1. The number of val...
JEE Main 2020 (Online) 3rd September Evening Slot
Consider the hypothetical situation where the azimuthal quantum number, $$l$$, takes values 0, 1, 2, ....., n + 1, where...
JEE Main 2020 (Online) 3rd September Evening Slot
Among the statements (I – IV), the correct ones are: (I) Be has smaller atomic radius compared to Mg. (II) Be has higher...
JEE Main 2020 (Online) 3rd September Evening Slot
The atomic number of the element unnilennium is :
JEE Main 2020 (Online) 3rd September Morning Slot
Three elements X, Y and Z are in the 3rd period of the periodic table. The oxides of X, Y and Z, respectively, are basic...
JEE Main 2020 (Online) 2nd September Evening Slot
In general the property (magnitudes only) that show an opposite trend in comparison to other properties across a period ...
JEE Main 2020 (Online) 2nd September Morning Slot
The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol–1, respectively. How many moles of HCl and...
JEE Main 2020 (Online) 9th January Evening Slot
The electronic configurations of bivalent europium and trivalent cerium are (atomic number : Xe = 54, Ce = 58, Eu = 63)...
JEE Main 2020 (Online) 9th January Morning Slot
The acidic, basic and amphoteric oxides, respectively, are :
JEE Main 2020 (Online) 9th January Morning Slot
B has a smaller first ionization enthalpy than Be. Consider the following statements : (I) It is easier to remove 2p ele...
JEE Main 2020 (Online) 9th January Morning Slot
The increasing order of the atomic radii of the following elements is :- (a) C (b) O (c) F (d) Cl (e) Br
JEE Main 2020 (Online) 8th January Evening Slot
The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :
JEE Main 2020 (Online) 8th January Morning Slot
The third ionization enthalpy is minimum for :
JEE Main 2020 (Online) 8th January Morning Slot
Within each pair of elements F &amp; Cl, S &amp; Se, and Li &amp; Na, respectively, the elements that release more energ...
JEE Main 2020 (Online) 7th January Evening Slot
The electron gain enthalpy (in KJ/mol) of fluorine, chlorine, bromine and iodine, respectively are:
JEE Main 2020 (Online) 7th January Morning Slot
The atomic radius of Ag is closed to :
JEE Main 2020 (Online) 7th January Morning Slot
In comparison to boron, berylium has :
JEE Main 2019 (Online) 12th April Evening Slot
The pair that has similar atomic radii is :
JEE Main 2019 (Online) 12th April Evening Slot
Among the following, the energy of 2s orbital is lowest in :
JEE Main 2019 (Online) 12th April Evening Slot
The correct sequence of thermal stability of the following carbonates is :
JEE Main 2019 (Online) 12th April Morning Slot
The correct order of the first ionization enthalpies is :
JEE Main 2019 (Online) 10th April Evening Slot
The highest possible oxidation states of uranium and plutonium, respectively are
JEE Main 2019 (Online) 10th April Evening Slot
The correct order of catenation is :
JEE Main 2019 (Online) 10th April Morning Slot
The element having greatest difference between its first and second ionization energies, is :
JEE Main 2019 (Online) 9th April Morning Slot
The IUPAC symbol for the element with atomic number 119 would be :
JEE Main 2019 (Online) 8th April Evening Slot
The size of the iso-electronic species Cl–, &nbsp;Ar and Ca2+ is affected by :
JEE Main 2019 (Online) 8th April Morning Slot
The lathanide ion that would show colour is :
JEE Main 2019 (Online) 8th April Morning Slot
The correct order of hydration enthapies of alkali metal ions is :
JEE Main 2019 (Online) 8th April Morning Slot
The correct order of atomic radii is -
JEE Main 2019 (Online) 12th January Evening Slot
The element with Z = 120 (not yet discovered) will be an/a -
JEE Main 2019 (Online) 12th January Morning Slot
The relative stability of +1 oxidation state of group 13 elements follows the order :
JEE Main 2019 (Online) 11th January Evening Slot
The correct option with respect to the Pauling electronegativity values of the element is :
JEE Main 2019 (Online) 11th January Evening Slot
The correct order of the atomic radii of C, Cs, Al, and S is :
JEE Main 2019 (Online) 11th January Morning Slot
The 71st electron of an element X with an atomic number of 71 enters into the orbital;
JEE Main 2019 (Online) 10th January Evening Slot
The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :
JEE Main 2019 (Online) 10th January Morning Slot
The electronegativity of aluminium is similar to :
JEE Main 2019 (Online) 10th January Morning Slot
When the first electron gain enthalpy $$\left( {{\Delta _{eg}}H} \right)$$ of oxygen is $$-$$ 141 kJ/mol, its second ele...
JEE Main 2019 (Online) 9th January Evening Slot
Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in + 1 and + 3 oxidation states. This is ...
JEE Main 2019 (Online) 9th January Morning Slot
In general, the properties that decrease and increase down a group in the periodic table, respectively, are :
JEE Main 2019 (Online) 9th January Morning Slot
The correct order of electron affinity is :
JEE Main 2018 (Online) 15th April Evening Slot
For Na+, Mg2+, F- and O2-; the correct order of increasing ionic radii is :
JEE Main 2018 (Online) 15th April Morning Slot
The electronic configuration with the highest ionization enthalpy is :
JEE Main 2017 (Online) 9th April Morning Slot
Consider the following ionization enthalpies of two elements 'A' and 'B' . .tg {border-collapse:collapse;border-spacin...
JEE Main 2017 (Online) 8th April Morning Slot
The following statements concern elements in the periodic table. Which of the following is true ?
JEE Main 2016 (Online) 10th April Morning Slot
The ionic radii (in Å) of N3–, O2– and F– are respectively:
JEE Main 2015 (Offline)
The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be:
JEE Main 2013 (Offline)
Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar?
JEE Main 2013 (Offline)
The increasing order of the ionic radii of the given isoelectronic species is :
AIEEE 2012
Outer electronic configuration of Gd (Atomic no : 64) is -
AIEEE 2011
Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ?
AIEEE 2011
The correct sequence which shows decreasing order of the ionic radii of the elements is
AIEEE 2010
The set representing the correct order of ionic radius is :
AIEEE 2009
In which of the following arrangements, the sequence is not strictly according to the property written against it?
AIEEE 2009
In which of the following arrangements, the sequence is not strictly according to the property written against it
AIEEE 2009
Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are give...
AIEEE 2006
In which of the following arrangements the order is NOT according to the property indicated against it?
AIEEE 2005
Which of the following oxides is amphoteric in character?
AIEEE 2005
The formation of the oxide ion O2-(g) requires first an exothermic and then an endothermic step as shown below O(g) + e...
AIEEE 2004
Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is...
AIEEE 2004
Which one of the following ions has the highest value of ionic radius?
AIEEE 2004
The atomic numbers of Vanadium (V), Chromium (cr), Manganese (Mn) and Iron (Fe), respectively, $$23,24,25$$ and $$26$$. ...
AIEEE 2003
The reduction in atomic size with increase in atomic number is a characteristic of elements of
AIEEE 2003
Which one of the following is an amphoteric oxide?
AIEEE 2003
According to the Periodic Law of elements, the variation in properties of elements is related to their
AIEEE 2003
$$C{e^{ + 3}},\,\,L{a^{ + 3}},\,\,P{m^{ + 3}}\,\,$$ and $$Y{b^{ + 3}}\,\,$$ have ionic radial in the increasing order ...
AIEEE 2002
The correct order of ionic radius is
AIEEE 2002

## Numerical

More
The number of f electrons in the ground state electronic configuration of Np (Z = 93) is ___________. (Nearest integer)
JEE Main 2021 (Online) 27th August Morning Shift
The number of 4f electrons in the ground statement electronic configuration of Gd2+ is ___________. [Atomic number of Gd...
JEE Main 2021 (Online) 26th August Morning Shift
These are physical properties of an element(A) Sublimation enthalpy(B) Ionisation enthalpy(C) Hydration enthalpy(D) Elec...
JEE Main 2021 (Online) 26th August Morning Shift
Number of electrons present in 4f orbital of Ho3+ ion is ____________. (Given Atomic No. of Ho = 67)
JEE Main 2021 (Online) 25th July Evening Shift
Number of amphoteric compounds among the following is ________. (A) BeO (B) BaO (C) Be(OH)2 (D) Sr(OH)2...
JEE Main 2021 (Online) 24th February Morning Slot
The atomic number of Unnilunium is _______.
JEE Main 2020 (Online) 6th September Evening Slot

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