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Chemistry - s Block Elements

Practise 9 WBJEE previous year questions on s Block Elements, compiled from papers spanning 2014 to 2023. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty WBJEE tests.

s Block Elements has been asked in 8 of the 18 years of WBJEE papers analysed (2009–2026), with 9 questions in all. 67% of them were easy, 22% moderate and 11% tough. Most of its questions came from 2016, with 2 questions that year. In the last three years (2024–2026) it had 0 questions across 3 papers, about 0 per paper.

The chapter's 2 topics are not weighted equally: Alkaline Earth Metals (5 questions, 56%) and Compounds of Alkali Metals (4 questions, 44%) have been asked the most. Over the last five years the most frequent topics have been Compounds of Alkali Metals (1) and Alkaline Earth Metals (1). Alkaline Earth Metals has produced the most tough questions (1).

  1. 1\( {Na}_2 {CO}_3\) is prepared by Solvay process but \( {K}_2 {CO}_3\) cannot be prepared by the same because2023Compounds of Alkali Metals
  2. 2A sample of is dissolved in dil. and the solution is neutralized with ammonia and buffered with . Disodium hydrogen phosphate reagent is add2022Alkaline Earth Metals
  3. 3The white precipitate , obtained on passing colourless and odourless gas through an ammoniacal solution of , loses about of its weight on he2021Compounds of Alkali Metals
  4. 4In the extraction of Ca by electro reduction of molten some is added to the electrolyte for the following reason:2020Alkaline Earth Metals
  5. 5During electrolysis of molten some water was added. What will happen?2017Compounds of Alkali Metals
  6. 6If radium and chlorine combine to form radium chloride, the compound would be2016Alkaline Earth Metals
  7. 7The number of and bonds between two carbon atoms in calcium carbide are2016Alkaline Earth Metals
  8. 8Preview not available - open to view this question.2015Alkaline Earth Metals
  9. 9If is passed through hot aqueous , the products formed have Cl in different oxidation states. These are indicated as2014Compounds of Alkali Metals

Frequently Asked Questions

1.How many questions are available for s Block Elements?

This chapter includes 9 questions compiled from WBJEE papers spanning 2014 to 2023.

2.Are these questions only from WBJEE, or from other exams too?

These are WBJEE questions specifically for the s Block Elements chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is s Block Elements an important chapter for WBJEE Chemistry?

s Block Elements has appeared in 8 of the 18 years of WBJEE papers covered here, with 9 questions across 8 papers - about one per paper it appears in.

4.What is the difficulty level of s Block Elements questions in WBJEE?

Of the 9 questions analysed for this chapter, 67% are easy, 22% moderate and 11% tough. 2016 had the most, with 2 questions.

5.Which topics in s Block Elements should I focus on?

These topics have carried the most weightage in s Block Elements:

  • Alkaline Earth Metals - 5 questions (56%)
  • Compounds of Alkali Metals - 4 questions (44%)
  • Alkaline Earth Metals has produced the most tough questions (1).
6.Is s Block Elements's weightage in WBJEE going up or down?

Across all 8 papers analysed, s Block Elements has averaged about 1.1 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.