JEE Main Hydrogen — practice questions
36 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice JEE Main Hydrogen in the app →The modern periodic law states that the physical and chemical properties of elements are periodic functions ofElements of the modern periodic table are classified into how many blocks based on the differentiating electroAcross a period from left to right, the atomic radius generally:Which element has the highest first ionization energy in period 2?Which of the following arrangements is in correct order of increasing electronegativity (Pauling scale)?The element with electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^3$ belongs to which group Per NCERT §3.2, John Newlands' LAW OF OCTAVES (1865) noted what about elements arranged by increasing atomic 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 Table 3.4, in IUPAC systematic nomenclature for Z > 100, what are the digit roots for 1, 2 and 0 resPer NCERT Table 3.5, the IUPAC OFFICIAL name + symbol for Z = 104 is which?Per 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 §3.6.5, 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 §3.7.1(a), the COVALENT RADIUS of a non-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 §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 Table 3.6(b), the atomic radius of HALOGENS DOWN Group 17 follows what trend?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 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 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:The most electronegative element on the periodic table is:Heavy water, used as moderator in nuclear reactors, has the formula:In ionic hydrides like NaH, the oxidation state of hydrogen is:Temporary hardness of water in a kitchen bucket is removed by:A hydrogen fuel cell on the lab bench produces electricity by: