Chemistry - Surface Chemistry
Practise 5 WBJEE previous year questions on Surface Chemistry, compiled from papers spanning 2014 to 2025. 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.
Surface Chemistry has been asked in 5 of the 18 years of WBJEE papers analysed (2009–2026), with 5 questions in all. 100% of them were easy, 0% moderate and 0% tough. Most of its questions came from 2025, with 1 question that year. In the last three years (2024–2026) it had 1 question across 3 papers, about 0.3 per paper.
The chapter's 2 topics are not weighted equally: Colloids (3 questions, 60%) and Properties of colloidal solution (2 questions, 40%) have been asked the most. Over the last five years the most frequent topics have been Properties of colloidal solution (1).
- 1The coagulating power of electrolytes having ions and for sol increases in the order2025Properties of colloidal solution
- 2Among the following, the ion which will be more effective for flocculation of sol. is2020Colloids
- 3Point out the false statement.2016Colloids
- 4The dispersed phase and dispersion medium of fog respectively are2015Colloids
- 5The amount of electrolytes required to coagulate a given amount of Agl colloidal solution (-ve charge) will be in the order2014Properties of colloidal solution
Frequently Asked Questions
1.How many questions are available for Surface Chemistry?
This chapter includes 5 questions compiled from WBJEE papers spanning 2014 to 2025.
2.Are these questions only from WBJEE, or from other exams too?
These are WBJEE questions specifically for the Surface Chemistry chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Surface Chemistry an important chapter for WBJEE Chemistry?
Surface Chemistry has appeared in 5 of the 18 years of WBJEE papers covered here, with 5 questions across 5 papers - about one per paper it appears in.
4.What is the difficulty level of Surface Chemistry questions in WBJEE?
Of the 5 questions analysed for this chapter, 100% are easy, 0% moderate and 0% tough. 2025 had the most, with 1 question.
5.Which topics in Surface Chemistry should I focus on?
These topics have carried the most weightage in Surface Chemistry:
- Colloids - 3 questions (60%)
- Properties of colloidal solution - 2 questions (40%)
6.Is Surface Chemistry's weightage in WBJEE going up or down?
Across all 5 papers analysed, Surface Chemistry has averaged about 1.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.