CBSE Class 11 Periodic Table — practice questions
52 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 Periodic Table in the app →Per NCERT §3.2, Dobereiner's LAW OF TRIADS (1829) said which of the following about a triad of three elements?Per NCERT §3.2, John Newlands' LAW OF OCTAVES (1865) noted what about elements arranged by increasing atomic wPer NCERT §3.2, Mendeleev's Periodic Law (1869) stated the properties of elements are a PERIODIC FUNCTION of wPer NCERT §3.2 + Table 3.3, Mendeleev predicted the existence of 'Eka-aluminium' and 'Eka-silicon' — which latPer NCERT §3.3, the MODERN periodic law (post-Moseley 1913) states that properties of elements are a periodic Per NCERT §3.3, Henry Moseley's 1913 work was based on plotting which quantity vs atomic number Z to obtain a Per NCERT §3.3, the long form of the periodic table contains how many periods, and the 6th + 7th periods wouldPer NCERT §3.3, the IUPAC system numbers the groups in the modern table from which range, replacing the older Per NCERT Table 3.4, in IUPAC systematic nomenclature for Z > 100, what are the digit roots for 1, 2 and 0 resPer NCERT Problem 3.1, the IUPAC systematic name + symbol for the element with atomic number 120 are which?Per NCERT Table 3.5, the IUPAC OFFICIAL name + symbol for Z = 104 is which?Per NCERT §3.3 note, how many naturally occurring elements does the Periodic Law currently apply to (includingPer NCERT §3.6, elements are classified into FOUR BLOCKS based on what?Per NCERT §3.6.1, alkali metals (Group 1) and alkaline earth metals (Group 2) have outermost configurations ofPer NCERT §3.6.2, the p-block elements occupy which groups in the periodic table, with valence-shell configuraPer NCERT §3.6.2, which two groups of p-block elements are the HALOGENS and the CHALCOGENS respectively?Per NCERT §3.6.3, d-block (transition) elements occupy which groups and have what general outer configuration?Per NCERT §3.6.3, which Group 12 elements (Zn, Cd, Hg) DO NOT show typical d-block (transition) properties, anPer NCERT §3.6.4, the f-block elements (inner-transition) consist of which TWO series, and their atomic-numberPer NCERT §3.3, the PERIOD number in the modern periodic table corresponds to which quantity?Per NCERT §3.6.5, what fraction of all known elements are METALS, and where do they sit in the periodic table?Per NCERT §3.6.5, which elements bordering the metal/non-metal staircase are called METALLOIDS (semi-metals)?Per NCERT §3.6, which exceptional element is positioned in the s-block (1s¹) but is sometimes placed with haloPer NCERT §3.6, helium has electronic configuration 1s² (s-block) but is placed in Group 18 (p-block, noble gaPer NCERT §3.7.1(a), the COVALENT RADIUS of a non-metal atom is defined as which quantity?Per NCERT, the METALLIC RADIUS of a metal atom is defined as which quantity?Per NCERT §3.7.1(a), the TREND of atomic radius across a PERIOD (left to right) and DOWN a group is which?Per NCERT Table 3.6(a), how does the atomic radius of Period-II elements change from Li (152 pm) to F (64 pm)?Per NCERT §3.7.1(b), why is a CATION smaller than its parent neutral atom?Per NCERT §3.7.1(b), why is an ANION LARGER than its parent neutral atom?Per NCERT §3.7.1(b), what does ISOELECTRONIC mean, and which example does the textbook give?Per NCERT §3.7.1(b), among the ISOELECTRONIC species O²⁻, F⁻, Na⁺, Mg²⁺ (each with 10 e⁻), which has the LARGEPer NCERT Problem 3.5, among the species Mg, Mg²⁺, Al, Al³⁺, which is the LARGEST and which is the SMALLEST?Per NCERT Table 3.6(b), the atomic radius of HALOGENS DOWN Group 17 follows what trend?Per NCERT §3.7.1(a) (final note), why are the radii of NOBLE GASES NOT compared directly with covalent radii oPer NCERT §3.7.1(b) (last paragraph), comparing F (64 pm) and F⁻ (136 pm), the F⁻ ion is more than twice as laPer NCERT §3.7.1(c), the FIRST IONISATION ENTHALPY of an element X represents which process?Per NCERT §3.7.1(c), why is the FIRST ionisation enthalpy of BORON (Z=5) LESS than that of BERYLLIUM (Z=4) desPer NCERT §3.7.1(c), why is the first ionisation enthalpy of OXYGEN (Z=8) LESS than that of NITROGEN (Z=7)?Per NCERT §3.7.1(c), the GENERAL trend of first ionisation enthalpy across a period and down a group is which?Per NCERT §3.7.1(d), the ELECTRON GAIN ENTHALPY ΔₑgH represents enthalpy change for which reaction?Per NCERT Table 3.7, which element has the MOST NEGATIVE electron gain enthalpy and why is it NOT fluorine?Per NCERT §3.7.1(d), why do NOBLE GASES have LARGE POSITIVE electron gain enthalpies (e.g. He +48, Ne +116 kJ/Per NCERT §3.7.1(e) + Table 3.8, ELECTRONEGATIVITY on the Pauling scale assigns which value to FLUORINE — and Per NCERT §3.7.2(a) (valence), the VALENCE of representative (s + p block) elements equals which of the followPer NCERT Problem 3.8, predicting the formula formed by SILICON (Group 14) and BROMINE (Group 17) gives which Per NCERT §3.7.2(b) (anomalous), the DIAGONAL RELATIONSHIP refers to similarity between which pairs of period-Per NCERT §3.7.3, oxides of elements show what acid–base trend across a period?The modern periodic law arranges elements in order of:Across a period from left to right, atomic radius generally:Among Li, Na, K, Cs, the element with the highest first ionisation enthalpy is:The most electronegative element on the periodic table is: