JEE Main s-Block, p-Block Elements and Hydrogen questions with solutions
Hydrogen, alkali and alkaline earth metals, and groups 13 to 18 with their oxides, oxoacids, halides and hydrides. 23 questions from our 2016–2025 JEE Main pattern papers, from the Class 11 and 12 Chemistry syllabus. Each has the answer and a full solution.
Also practise: s-Block, p-Block Elements and Hydrogen for JEE Advanced
JEE Main 2025
JEE Main 2024
JEE Main 2023
JEE Main 2022
- Chlorine is passed through hot concentrated NaOH solution, so that the only chlorine-containing products are NaCl and NaClO3. The mass of NaClO3…
- S-block compounds is correct?
- The total number of P - OH bonds present in one molecule each of orthophosphoric acid, phosphorous acid, hypophosphorous acid and pyrophosphoric acid…
JEE Main 2021
JEE Main 2020
JEE Main 2019
- Phosphorous acid, H3PO3, on heating disproportionates to H3PO4 and PH3. Starting with 8.2 g of H3PO3 (molar mass 82) and complete reaction, the mass…
- Hard water contains 81 mg of Ca(HCO3)2 (M =162) and 73 mg of Mg(HCO3)2 (M =146) per litre. Using Clark's method, with Ca(OH)2 (M =74) precipitating…
- 50 mL of a 6.8% (w/v) solution of hydrogen peroxide is completely decomposed to H2O and O2. Taking R=0.0821 L atm K^-1 mol^-1 and H = 1, O = 16, the…
JEE Main 2018
- The total number of ionisable (O-H, acidic) hydrogen atoms present in one molecule each of H3PO2, H3PO3, H3PO4 and H4P2O7 taken together is
- In the anion of borax, [B4O5(OH)4]^2-, the number of B-O-B bridges and the number of sp^3 hybridised boron atoms are, respectively,
- In the Solvay process, 2NaCl→ Na2CO3 overall. Starting from 1.00 kg of pure NaCl (M=58.5) and an overall yield of 80%, the mass of anhydrous sodium…
JEE Main 2017
- White phosphorus (P4, M=124) is heated with excess concentrated NaOH solution, giving phosphine and sodium hypophosphite. From 6.2 g of P4, the…
- Consider the statements: (i) thermal stability of carbonates of group 2 increases down the group; (ii) LiNO3 on heating gives Li2O, NO2 and O2; (iii)…
- Temporary hardness of a water sample is due to 81 ppm of Ca(HCO3)2 (M=162) and 73 ppm of Mg(HCO3)2 (M=146) (1 ppm =1 mg L^-1). In Clarke's process…
JEE Main 2016
- 10 mL each of 0.10 M H3PO2, 0.10 M H3PO3 and 0.10 M H4P2O7 are mixed. The volume of 0.10 M NaOH required for complete neutralisation of the mixture is
- 44 g of gypsum (CaSO4·2H2O, M=172) is first heated to 393 K and then to 773 K. The masses of the solid left after the first and the second heating…
- Taking 20-volume hydrogen peroxide to mean that 1 mL liberates 20 mL of O2 at STP (molar volume 22.4 L) on decomposition, the volume of 0.10 M…
Other Chemistry topics
Alcohols, Phenols, Ethers and Haloalkanes 16Atomic Structure 12Biomolecules and Polymers 14Carbonyl Compounds, Carboxylic Acids and Amines 25Chemical Bonding and Molecular Structure 14Chemical Equilibrium 10Chemical Kinetics 13Chemical Thermodynamics 16Coordination Compounds 18Electrochemistry 18General Organic Chemistry and Isomerism 13Hydrocarbons 16Ionic Equilibrium 11Mole Concept and Stoichiometry 12Periodic Properties 9Qualitative and Practical Chemistry 8Redox Reactions and Titrations 9Solutions, Solid State and Surface Chemistry 19d- and f-Block Elements and Metallurgy 14