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MCQ (Single Correct Answer)

JEE Main 2024 (Online) 1st February Evening Shift
The transition metal having highest $3^{\text {rd }}$ ionisation enthalpy is :
JEE Main 2024 (Online) 1st February Evening Shift
Given below are two statements : Statement (I) : Both metals and non-metals exist in p and d-block elements. Statement (II) : Non-metals have higher i...
JEE Main 2024 (Online) 31st January Evening Shift
Consider the following elements. Which of the following is/are true about $$\mathrm{A}^{\prime}, \mathrm{B}^{\prime}, \mathrm{C}^{\prime}$$ and $$\ma...
JEE Main 2024 (Online) 31st January Morning Shift
The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D. S Choose the most appropriate from the options give...
JEE Main 2024 (Online) 30th January Evening Shift
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: $$\mathrm{H}_2 \mathrm{Te}$$ is mor...
JEE Main 2024 (Online) 30th January Evening Shift
Given below are two statements: Statement - I: Along the period, the chemical reactivity of the elements gradually increases from group 1 to group 18 ...
JEE Main 2024 (Online) 30th January Morning Shift
Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2024 (Online) 29th January Evening Shift
Given below are two statements: Statement I : Fluorine has most negative electron gain enthalpy in its group. Statement II : Oxygen has least negative...
JEE Main 2024 (Online) 29th January Evening Shift
The element having the highest first ionization enthalpy is
JEE Main 2024 (Online) 29th January Evening Shift
Anomalous behavior of oxygen is due to its
JEE Main 2024 (Online) 29th January Morning Shift
Given below are two statements : one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$ : Assertion A : The fi...
JEE Main 2024 (Online) 29th January Morning Shift
Given below are two statements : Statement I : The electronegativity of group 14 elements from $$\mathrm{Si}$$ to $$\mathrm{Pb}$$, gradually decreases...
JEE Main 2024 (Online) 27th January Morning Shift
Given below are two statements : Statement (I) : The $$4 \mathrm{f}$$ and $$5 \mathrm{f}$$ - series of elements are placed separately in the Periodic ...
JEE Main 2023 (Online) 13th April Morning Shift
Which of the following statements are not correct? A. The electron gain enthalpy of $$\mathrm{F}$$ is more negative than that of $$\mathrm{Cl}$$. B. I...
JEE Main 2023 (Online) 11th April Morning Shift
For elements $$\mathrm{B}, \mathrm{C}, \mathrm{N}, \mathrm{Li}, \mathrm{Be}, \mathrm{O}$$ and $$\mathrm{F}$$, the correct order of first ionization en...
JEE Main 2023 (Online) 10th April Evening Shift
Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$ Assertion A : The energ...
JEE Main 2023 (Online) 8th April Morning Shift
The correct order of electronegativity for given elements is:
JEE Main 2023 (Online) 6th April Evening Shift
Which one of the following elements will remain as liquid inside pure boiling water?
JEE Main 2023 (Online) 6th April Evening Shift
Group-13 elements react with $$\mathrm{O}_{2}$$ in amorphous form to form oxides of type $$\mathrm{M}_{2} \mathrm{O}_{3}~(\mathrm{M}=$$ element). Whic...
JEE Main 2023 (Online) 6th April Morning Shift
The difference between electron gain enthalpies will be maximum between :
JEE Main 2023 (Online) 31st January Evening Shift
Which of the following elements have half-filled f-orbitals in their ground state? (Given : atomic number $\mathrm{Sm}=62 ; \mathrm{Eu}=63 ; \mathrm{...
JEE Main 2023 (Online) 31st January Evening Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): The first ionization enthalp...
JEE Main 2023 (Online) 31st January Morning Shift
The correct increasing order of the ionic radii is
JEE Main 2023 (Online) 30th January Evening Shift
Bond dissociation energy of "E-H" bond of the "$\mathrm{H}_{2} \mathrm{E}$ " hydrides of group 16 elements (given below), follows order. A. $\mathrm{O...
JEE Main 2023 (Online) 30th January Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 29th January Evening Shift
Given below are two statements : Statement I : The decrease in first ionization enthalpy from B to Al is much larger than that from Al to Ga. Statemen...
JEE Main 2023 (Online) 25th January Morning Shift
Inert gases have positive electron gain enthalpy. Its correct order is :
JEE Main 2022 (Online) 29th July Morning Shift
The first ionization enthalpy of Na, Mg and Si, respectively, are : 496, 737 and $$786 \mathrm{~kJ} \mathrm{~mol}^{-1}$$. The first ionization enthalp...
JEE Main 2022 (Online) 28th July Morning Shift
In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical? (A) Rb and Cs (B) Na and K (C) Ar ...
JEE Main 2022 (Online) 27th July Morning Shift
The incorrect statement is
JEE Main 2022 (Online) 26th July Morning Shift
Given two statements below : Statement I : In $$\mathrm{Cl}_{2}$$ molecule the covalent radius is double of the atomic radius of chlorine. Statement I...
JEE Main 2022 (Online) 25th July Evening Shift
The first ionization enthalpies of Be, B, N and O follow the order
JEE Main 2022 (Online) 25th July Morning Shift
The IUPAC nomenclature of an element with electronic configuration [Rn] $$5 \mathrm{f}^{14} 6 \mathrm{d}^{1} 7 \mathrm{s}^{2}$$ is :
JEE Main 2022 (Online) 30th June Morning Shift
The correct order of electron gain enthalpy ($$-$$ ve value) is :
JEE Main 2022 (Online) 29th June Evening Shift
Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The first ionization enthalpy for ...
JEE Main 2022 (Online) 28th June Evening Shift
Match List - I with List - II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-...
JEE Main 2022 (Online) 28th June Evening Shift
Among the following, basic oxide is :
JEE Main 2022 (Online) 28th June Morning Shift
Element "E" belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of the element, which is just above "...
JEE Main 2022 (Online) 27th June Evening Shift
The correct order of increasing ionic radii is
JEE Main 2022 (Online) 27th June Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The ionic radii of O2$$-$$ ...
JEE Main 2022 (Online) 25th June Evening Shift
The correct order of electron gain enthalpies of Cl, F, Te and Po is
JEE Main 2022 (Online) 24th June Morning Shift
Given below are the oxides: Na2O, As2O3, N2O, NO and Cl2O7 Number of amphoteric oxides is :...
JEE Main 2021 (Online) 31st August Evening Shift
Match List - I with List - II : List - I(Metal Ion) List - II(Group of Qualitative analysis) (a) $$M{n^{2 + }}$$...
JEE Main 2021 (Online) 31st August Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Metallic character decreases...
JEE Main 2021 (Online) 27th August Evening Shift
The correct order of ionic radii for the ions, P3$$-$$, S2$$-$$, Ca2+, K+, Cl$$-$$ is :
JEE Main 2021 (Online) 26th August Evening Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Barium carbonate is insolubl...
JEE Main 2021 (Online) 27th July Evening Shift
The correct order of first ionisation enthalpy is :
JEE Main 2021 (Online) 27th July Morning Shift
Match List - I with List - II : List - I List - II (a) NaOH (i) Acidic (b) $$Be{(OH)_2}$$ ...
JEE Main 2021 (Online) 25th July Evening Shift
The ionic radii of F$$-$$ and O2$$-$$ respectively are 1.33$$\mathop A\limits^o $$ and 1.4$$\mathop A\limits^o $$, while the covalent radius of N is 0...
JEE Main 2021 (Online) 25th July Morning Shift
The ionic radii of K+, Na+, Al3+ and Mg2+ are in the order:
JEE Main 2021 (Online) 22th July Evening Shift
Which one of the following statements for D.I. Mendeleeff, is incorrect?
JEE Main 2021 (Online) 18th March Evening Shift
The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. The elements X, Y and Z, respe...
JEE Main 2021 (Online) 17th March Morning Shift
The absolute value of the electron gain enthalpy of halogens satisfies :
JEE Main 2021 (Online) 16th March Evening Shift
The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are :
JEE Main 2021 (Online) 16th March Evening Shift
Identify the elements X and Y using the ionisation energy values given below : Ionization energy (kJ/mol) 1$${st}$$...
JEE Main 2021 (Online) 26th February Evening Shift
Which pair of oxides is acidic in nature?
JEE Main 2021 (Online) 26th February Evening Shift
The correct order of electron gain enthalpy is :
JEE Main 2021 (Online) 26th February Morning Shift
Match List - I with List - II. List I Electronic configuration List II $${\Delta _i}H$$ in kJ $$mo{l^{ - 1}}$$ (a) ...
JEE Main 2021 (Online) 25th February Evening Shift
The correct order of bond dissociation enthalpy of halogens is :
JEE Main 2021 (Online) 24th February Morning Shift
Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :
JEE Main 2020 (Online) 5th September Evening Slot
The correct order of the ionic radii of O2–, N3–, F– , Mg2+, Na+ and Al3+ is :
JEE Main 2020 (Online) 4th September Morning Slot
The ionic radii of O2–, F–, Na+ and Mg2+ are in the order :
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 ionization enthalpy than Al. ...
JEE Main 2020 (Online) 3rd September Evening Slot
The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol–1. The number of valence electrons in the element ...
JEE Main 2020 (Online) 3rd September Morning Slot
The atomic number of the element unnilennium is :
JEE Main 2020 (Online) 2nd September Evening 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, amphoteric and acidic. The c...
JEE Main 2020 (Online) 2nd September Morning Slot
In general the property (magnitudes only) that show an opposite trend in comparison to other properties across a period is
JEE Main 2020 (Online) 9th January Evening Slot
The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol–1, respectively. How many moles of HCl and H2SO4, respectively, will be ...
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 electron than 2s electron (II) 2p...
JEE Main 2020 (Online) 9th January Morning Slot
The acidic, basic and amphoteric oxides, respectively, are :
JEE Main 2020 (Online) 9th January Morning Slot
The electronic configurations of bivalent europium and trivalent cerium are (atomic number : Xe = 54, Ce = 58, Eu = 63)
JEE Main 2020 (Online) 8th January Evening 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 Morning Slot
The third ionization enthalpy is minimum for :
JEE Main 2020 (Online) 8th January Morning Slot
The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :
JEE Main 2020 (Online) 7th January Evening Slot
Within each pair of elements F & Cl, S & Se, and Li & Na, respectively, the elements that release more energy upon and electron gain are :
JEE Main 2020 (Online) 7th January Morning Slot
The electron gain enthalpy (in KJ/mol) of fluorine, chlorine, bromine and iodine, respectively are:
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
In comparison to boron, berylium has :
JEE Main 2019 (Online) 9th April Morning Slot
The element having greatest difference between its first and second ionization energies, is :
JEE Main 2019 (Online) 8th April Evening Slot
The IUPAC symbol for the element with atomic number 119 would be :
JEE Main 2019 (Online) 8th April Morning Slot
The size of the iso-electronic species Cl–,  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) 12th January Morning Slot
The element with Z = 120 (not yet discovered) will be an/a -
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 Morning Slot
The correct order of the atomic radii of C, Cs, Al, and S is :
JEE Main 2019 (Online) 10th January Morning Slot
The electronegativity of aluminium is similar to :
JEE Main 2019 (Online) 9th January Evening Slot
When the first electron gain enthalpy $$\left( {{\Delta _{eg}}H} \right)$$ of oxygen is $$-$$ 141 kJ/mol, its second electron gain enthalpy 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
Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in + 1 and + 3 oxidation states. This is due to :
JEE Main 2018 (Online) 15th April Evening Slot
The correct order of electron affinity is :
JEE Main 2018 (Online) 15th April Morning Slot
For Na+, Mg2+, F- and O2-; the correct order of increasing ionic radii is :
JEE Main 2017 (Online) 9th April Morning Slot
The electronic configuration with the highest ionization enthalpy is :
JEE Main 2017 (Online) 9th April Morning Slot
Which one of the following is an oxide?
JEE Main 2017 (Online) 8th April Morning Slot
Consider the following ionization enthalpies of two elements 'A' and 'B' . .tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial...
JEE Main 2016 (Online) 10th April Morning Slot
The following statements concern elements in the periodic table. Which of the following is true ?
JEE Main 2015 (Offline)
The ionic radii (in Å) of N3–, O2– and F– are respectively:
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 first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be:
AIEEE 2012
The increasing order of the ionic radii of the given isoelectronic species is :
AIEEE 2011
Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ?
AIEEE 2011
Outer electronic configuration of Gd (Atomic no : 64) is -
AIEEE 2010
The correct sequence which shows decreasing order of the ionic radii of the elements is
AIEEE 2009
In which of the following arrangements, the sequence is not strictly according to the property written against it
AIEEE 2009
The set representing the correct order of ionic radius is :
AIEEE 2006
Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements g...
AIEEE 2006
The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is :
AIEEE 2005
Which of the following oxides is amphoteric in character?
AIEEE 2005
In which of the following arrangements the order is NOT according to the property indicated against it?
AIEEE 2004
Which one of the following ions has the highest value of ionic radius?
AIEEE 2004
Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is
AIEEE 2004
The formation of the oxide ion O2-(g) requires first an exothermic and then an endothermic step as shown below O(g) + e- = $$O_{(g)}^{-}$$ $$\Delta $...
AIEEE 2003
According to the Periodic Law of elements, the variation in properties of elements is related to their
AIEEE 2003
Which one of the following is an amphoteric oxide?
AIEEE 2003
The reduction in atomic size with increase in atomic number is a characteristic of elements of
AIEEE 2003
The atomic numbers of Vanadium (V), Chromium (cr), Manganese (Mn) and Iron (Fe), respectively, $$23,24,25$$ and $$26$$. Which one of these may be expe...
AIEEE 2002
The correct order of ionic radius is
AIEEE 2002
$$C{e^{ + 3}},\,\,L{a^{ + 3}},\,\,P{m^{ + 3}}\,\,$$ and $$Y{b^{ + 3}}\,\,$$ have ionic radial in the increasing order as

Numerical

JEE Main 2024 (Online) 30th January Morning Shift
If IUPAC name of an element is "Unununnium" then the element belongs to nth group of Periodic table. The value of n is ________.
JEE Main 2023 (Online) 29th January Evening Shift
Total number of acidic oxides among $$\mathrm{N_2O_3,NO_2,N_2O,Cl_2O_7,SO_2,CO,CaO,Na_2O}$$ and $$\mathrm{NO}$$ is ____________.
JEE Main 2021 (Online) 24th February Morning Shift
Number of amphoteric compounds among the following is ________. (A) BeO (B) BaO (C) Be(OH)2 (D) Sr(OH)2
JEE Main 2020 (Online) 6th September Evening Slot
The atomic number of Unnilunium is _______.
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