Classification of Elements and Periodicity in Properties — practice questions

114 curated practice questions from Classification of Elements and Periodicity in Properties (Chemistry JEE Main, NTA Exams) — 47 easy, 55 medium, 12 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.

• The maximum tendency to form unipositive ion is for the element which has the following electronic configuration :
• Outermost electronic configuration of least electronegative element in the periodic table is
• Given below are the two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R). Assertion…
• For elements B, C, N, Li, Be, O and F, the correct order of first ionization enthalpy is (Jee Main 2023)
• Match List – I with List – II LIST–I (Atomic number) LIST–II (Block of periodic table) (A) 37 I. p–block (B) 78 II…
• In which of the following pair, both the species are isoelectronic but first one is large in size than the second?
• Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The…
• In the fourth period of the periodic table, how many elements have one or more 4d electrons ?
• Number of elements from the following that CANNOT form compounds with valencies which match with their respective group…
• The first ionization enthalpy of Na, Mg and Si, respectively, are: 496, 737 and 786 kJ mol –1 . The first ionization…
• Given below are two statements: Statement I: The oxidation state of an element in a particular compound is the charge…
• Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is…
• The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D. S Choose the most…
• The correct order of the decreasing ionic radii among the following isoelectronic species is:
• The electronegativity of Cl, F, O, S increases in the order of
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. Assertion: Ionisation…
• The correct arrangement of the elements in the order of decreasing ionization energies is
• The statement(s) that are correct about the species. O ^ 2- , F – , Na + and Mg ^ 2+ (Jee Main 2024) (A) All are…
• For electron gain enthalpies of the elements denoted as A _ H , the incorrect option is : (Jee Main 2023)
• Which one is the correct order of the size of the iodine species.
• The correct order of the first ionization enthalpy is (Jee Main 2024)
• The correct order of first ionization enthalpy values of the following elements is: (A) O (B) N (C) Be (D) F (E) B…
• Match List-I with List-II. array |c|c| List-I & List-II (Element) & (Properties in their respective array Choose the…
• Given below are two statements: Statement I: The 4f and 5f - series of elements are placed separately in the Periodic…
• In iso – electronic species of Mg 2+ , N 3– , Al 3+ , the order of decreasing ionic radii will be
• Element “E” belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of the…
• The first four I.E. values of an element are 284, 412, 656 and 3210 kJ mol –1 . The number of valence electrons in the…
• Given below are two statements: Statement I: Both metal and non-metal exist in p and d-block elements. Statement II…
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. Assertion: The first…
• Which one of the following substances has the highest proton affinity?
• Which one of the following sets of ions represents a collection of isoelectronic species? (Given: Atomic Number: F : 9…
• The correct order of increasing ionisation potentials of K + , Ar, Cl – is
• Outermost electronic configurations of four elements A, B, C, D are given below: A. 3s 2 B. 3s 2 3p 1 C. 3s 2 3p 3 D…
• The IUPAC nomenclature of an element with electronic configuration [Rn]5f 14 6d 1 7s 2 is: (JEE Main 2022)
• Which of the following orders regarding ionisation energy is correct?
• Which of the following element is expected to have highest electron affinity
• The electron affinity value are negative for (Jee Main 2024) A. Be Be ^ - B. N ~N C. O O ^ 2- D. Na Na ^ - E. Al Al ^ …
• Which of the following elements is considered as a metalloid? (JEE Main 2022)
• The element having the highest first ionization enthalpy is:- (Jee Main 2024)
• Which of the following iso – electronic ions has the lowest ionisation energy ?
• Which of the following represents the correct order of metallic character of the given elements? (Jee Main 2023)
• Which of the following pairs has both members from the same group of periodic table
• Which of the following process involves the gain of energy ?
• An element will have lowest ionisation potential when its electronic configuration is
• The formation of the oxide ion O 2- (g) requires first an exothermic and then an endothermic step as shown below: O(g)…
• Correct order of first ionization potential among the following elements Be, B, C, N, O is
• Given below are the oxides : Na 2 O, As 2 O 3 , N 2 O, NO and Cl 2 O 7 Number of amphoteric oxides is : (JEE Main 2022)
• Given below are two statements: Statement I: Along the period, the chemical reactivity of the element gradually…
• The electronegativity of the following elements increases in the order:
• Given below are two statements: Statement I: The metallic radius of Na is 1.86 Å and the ionic radius of Na ^ + is…
• The correct order of ionic size of N 3– , Na + , F – , Mg 2+ and O 2– is :
• In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical? (A)…
• The outermost electronic configuration of the most electronegative element is:
• Consider the following elements. Group array l A ^ B ^ Period C ^ D ^ array Which of the following is/are true about…
• The electronic configuration of an element is 1s 2 , 2s 2 2p 6 , 3s 2 3p 3 . What is the atomic number of the element…
• The first, second and third ionsiation energies (E 1 , E 2 & E 3 ) for an element are 7 eV, 12.5 eV and 42.5 eV…
• Which one of the following ions has the highest value of ionic radius?
• The maximum energy is needed in the formation of monopositive gaseous ion of:
• If the aufbau principle had not been followed, Ca (Z = 20) would have been placed in the :
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. Assertion: First…
• The total number of acidic oxides from the following list is : NO, N 2 O, B 2 O 3 , N 2 O 5 , CO, SO 3 , P 4 O 10 (JEE…
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. Assertion: Helium has…
• Which of the following statements are not correct? A. The electron gain enthalpy of F is more negative than that of Cl…
• Elements whose outer electronic configuration vary from ns 2 np 1 to ns 2 np 6 constitute
• The element having greatest difference between its first and second ionization energies is:
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
• The correct order of electron gain enthalpies (magnitude only) of Cl, F, Te and Po is (JEE Main 2022)
• Amongst the following elements (whose electronic configurations are given in options), the one having the highest…
• Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?
• The value of electron affinity for noble gases is likely to be
• Arrange the following elements in the order of increasing atomic size Cl, S, P, Ar
• Identify the correct order of acidic strengths CO _ 2 , CuO _ 1 , CaO _ 2 , H _ 2 O
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
• The correct order of increasing ionic radii is (JEE Main 2022)
• Which of the following represent highly electropositive as well as highly electronegative element in its period
• Anomalous behaviour of oxygen is due to its (Jee Main 2024)
• Which one of the following is the electronic configuration of the strongest reducing agent among them?
• Elements in which outermost electron goes to anti-penultimate shell:
• The difference between electron gain enthalpies will be maximum between: (Jee Main 2023)
• The correct decreasing order for metallic character is (JEE Main 2022)
• The correct increasing order of the ionic radii is (Jee Main 2023)
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
• Which one of the ions in the table below would have the largest value of enthalpy of hydration?
• Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar?
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
• Given below are two statements: Statement I: Fluorine has most negative electron gain enthalpy in its group. Statement…
• Lowest IP will be shown by the element having the configuration:
• Identify the correct statements about p-block elements and their compounds. (A) Non-metals have higher…
• Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion (A)…
• Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: H 2…
• Among the following, basic oxide is : (JEE Main 2022)
• Given two statements below: Statement I: In Cl 2 molecule the covalent radius is double of the atomic radius of…
• The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are:
• In case of isoelectronic species the size of F − , Ne and Na + is affected by: (Jee Main 2024)
• The correct order of second I.E. of C, N, O and F are in the order :
• The element whose electronic configuration is 1s 2 , 2s 2 , 2p 6 , 3s 2 is
• The transition elements have a characteristic electronic configuration which can be represented as:
• K + , Ar , Ca 2 + , and S 2 - have:
• The element which has highest first ionization energy in the periodic table is
• The strongest reducing agent amount the following is: (Jee Main 2024)
• Which of the following material is not a semiconductor. (Jee Main 2024)
• Match List–I with List–II: array |l|l| List-I (Oxide) & List-II (Nature) (A) Cl _ 2 O _ 7 & (I) Amphoteric (B) Na _ 2 O…
• The IUPAC symbol for the element with atomic number 119 would be:
• The correct order of increasing electron affinity of the following elements is :
• Given below are two statements: Statement I: The correct order of first ionization enthalpy values of Li, Na, F and Cl…
• The first ionization enthalpies of Be, B, N and O follow the order (JEE Main 2022)
• The set representing the correct order of first ionisation potential is:
• The correct sequence which shows decreasing order of the ionic radii of the elements is:
• The correct order of electronegativity for the given elements is: (Jee Main 2023)
• The order of ionisation potential between He + ion and H-atom (both species are in gaseous state) is :
• The ions O 2- , F - , Na + , Mg 2 + and Al 3 + are isoelectronic. Their ionic radii shows:
• Arrange the elements in increasing order of atomic radius: Na, Rb, K, Mg.
• Given below are two statements: one is labelled as Assertion(A) and the other is labelled as Reason (R). Assertion (A)…

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