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Chemistry - Some Basic Concepts of Chemistry

Practise 108 AP EAMCET previous year questions on Some Basic Concepts of Chemistry, compiled from papers spanning 2001 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 AP EAMCET tests.

Some Basic Concepts of Chemistry has been asked in 21 of the 24 years of AP EAMCET papers analysed (2001–2024), with 108 questions in all. 56% of them were easy, 42% moderate and 3% tough. Most of its questions came from 2020, with 22 questions that year. In the last three years (2022–2024) it had 31 questions across 28 papers, about 1.1 per paper.

The chapter's 5 topics are not weighted equally: Concentration terms (44 questions, 41%), Quantitative measures in chemical equations (41 questions, 38%), and Mole concept (17 questions, 16%) have been asked the most. Concentration terms has also led over the last five years, with 24 questions. Quantitative measures in chemical equations has produced the most tough questions (3).

  1. 1The mass of a mixture containing NaCl and NaBr is 4.0 g. If Na is of the total mixture, the composition of NaCl in the mixture is26 May, 2025 (E)Quantitative measures in chemical equations
  2. 2Two acids A and B are titrated separately. 25 mL of solution requires 10 mL of A and 40 mL of B for complete neutralisation. The volume (in 24 May, 2025 (M)Concentration terms
  3. 3An ideal gas mixture of and occupies a volume of 28 L at 1 atm and 273 K. This mixture reacts completely with 128g of to produce and . What 23 May, 2025 (E)Quantitative measures in chemical equations
  4. 4Complete combustion of ethane gives only gaseous products. In a closed vessel, 15 g of ethane and 112 g of were allowed to completely react.23 May, 2025 (E)Quantitative measures in chemical equations
  5. 51.84 g of a mixture of and is strongly heated to get a residue of 0.96 g. The percentage of in the mixture is22 May, 2025 (M)Mole concept
  6. 6Consider the following A) 0.0025 B) 500.0 C) 2.0034 Number of significant figures in and C respectively, are22 May, 2025 (E)Significant Figures
  7. 7Observe the following I) 0.0063 II) 132.00 III) 1004 The number of significant figures in I, II and III is respectively21 May, 2025 (M)Significant Figures
  8. 8209 g of an element reacts with chlorine to form 315.5 g of its chloride. What is the weight (in g ) of oxygen that reacts with 418 g of sam21 May, 2025 (E)Quantitative measures in chemical equations
  9. 9At 300 K . the vapour pressures of and liquids are 500 and 400 mm Hg respectively. Equal moles of A and B are mixed to form an ideal solutio23 May, 2024 (M)Concentration terms
  10. 1010 g of a metal (M) reacts with oxygen to form 11.6 g of onide. What is the equivalent weight of M?22 May, 2024 (M)Quantitative measures in chemical equations
  11. 110.1 mole of potassium permanganate was heated at . What is the weight (ing) of the residue?21 May, 2024 (M)Laws of chemical combination
  12. 12A flask contains 98 mg of . If molecules of are removed from the flask, the number of moles of remained in flask is21 May, 2024 (E)Mole concept
  13. 13Cobalt (III) chloride forms a green coloured complex ' X ' with . Number of moles of AgCl formed when excess of solution is added to 100 mL 21 May, 2024 (E)Mole concept
  14. 14At STP ' ' of a metal hydrogen carbonate (molar mass ) on heating gives , which can completely react with 0.2 moles of MOH (molar mass 40 ) 20 May, 2024 (E)Quantitative measures in chemical equations
  15. 15A hydrocarbon containing C and H has . When 39 g of hydrocarbon was completely burnt in moles of water and y moles of were formed. moles of 18 May, 2024 (M)Quantitative measures in chemical equations
  16. 16The vapors of of an element occupy exerting a pressure of at . What is the molar mass (in ) of the element? (Assume vapors follow ideal gas 18 May, 2023 (M)Mole concept
  17. 17The molarity of the solution when of dissolved in of solution is18 May, 2023 (M)Concentration terms
  18. 18of methane was burnt completely in the presence of oxygen. The liberated gases were passed into a solution containing of . The weight of whi18 May, 2023 (E)Concentration terms
  19. 19One mole and one mole are taken in flask and heated to . At equilibrium, (by mass) of water reacted with as follows. Its value is17 May, 2023 (M)Concentration terms
  20. 20The molality of solution, when of glucose is added to the17 May, 2023 (M)Concentration terms
  21. 21of activated charcoal is added to of acetic acid (molar mass ), shaken well and filtered. The concentration of solution is reduced to . How 17 May, 2023 (E)Concentration terms
  22. 22The weight percentage of and in a hydrocarbon is in the ratio of . What is its empirical formula?16 May, 2023 (M)Quantitative measures in chemical equations
  23. 23A cylinder containing exerted a pressure of at . It was accidentally opened and some was escaped. When it was closed, it exerted a pressure 15 May, 2023 (M)Mole concept
  24. 24of is added to the of . To this solution extra of water was added. What is the molarity of the final solution formed?15 May, 2023 (M)Concentration terms
  25. 25The molarity of one molal glucose solution having density of is15 May, 2023 (M)Concentration terms
  26. 26of urea (molar mass ) and of glucose molar mass were dissolved in of water. The mass percent of urea and glucose is respectively15 May, 2023 (E)Concentration terms
  27. 27What is the total charge of one mole of electrons?08 Jul, 2022 (E)Mole concept
  28. 28The ratio of rate of diffusion of to is07 Jul, 2022 (M)Quantitative measures in chemical equations
  29. 29A reaction gas mixture contains , of and by volume, respectively. The mixture undergoes the following reactions. and are two products of the07 Jul, 2022 (M)Quantitative measures in chemical equations
  30. 30of gas and of gas diffuses through a porous membrane separately in 1 minute. If the vapour density of is , what is the vapour density of ?07 Jul, 2022 (E)Quantitative measures in chemical equations
  31. 31Match the following.07 Jul, 2022 (E)Laws of chemical combination
  32. 32If of is dissociated in aqueous solution of density , what is the molality of ion in the solution?06 Jul, 2022 (M)Concentration terms
  33. 33What is the atomic mass of ? Given abundance of06 Jul, 2022 (M)Mole concept
  34. 34The mass of carbon in is06 Jul, 2022 (E)Mole concept
  35. 35The mass of hydrogen (in grams) present in of pure water of density is06 Jul, 2022 (E)Mole concept
  36. 36of a substance is dissolved in of water at . The temperature is reduced to . The density is increased from 1.1 to . What is the change of mo05 Jul, 2022 (M)Concentration terms
  37. 37The statement related to law of definite proportions is04 Jul, 2022 (M)Laws of chemical combination
  38. 38How many grams of Mg is required to completely reduce 100 ml , 0 . 1 M NO 3 - solution using the following reaction NO 3 - + Mg Mg 2 + + NH 04 Jul, 2022 (E)Quantitative measures in chemical equations
  39. 39The empirical formula of Calgon is04 Jul, 2022 (E)Quantitative measures in chemical equations
  40. 40If the density of a solution of is , then find the molality of the solution. (molecular mass of )25 Aug, 2021 (M)Concentration terms
  41. 41Gastric juice contains about of per liter. If a person produce about 2.6 liters of gastric juice per day, find the number of antacid tablets25 Aug, 2021 (M)Quantitative measures in chemical equations
  42. 42of an acid gives of and , then ratio of percentage of and is25 Aug, 2021 (E)Concentration terms
  43. 43The mole fraction of a solute in one molal ethanolic solution would be25 Aug, 2021 (E)Concentration terms
  44. 44In each molecule of carbon tetrachloride, the mass percent of carbon and chlorine respectively are24 Aug, 2021 (M)Concentration terms
  45. 45Calculate the amount of hydrogen gas required in order to produce of ammonia by the reaction of and gases.24 Aug, 2021 (E)Quantitative measures in chemical equations
  46. 46The volume strength (in ) of is approximately24 Aug, 2021 (E)Concentration terms
  47. 47For formation of of ammonia gas, what volumes of hydrogen gas and nitrogen gas, respectively are required at NTP conditions?23 Aug, 2021 (M)Quantitative measures in chemical equations
  48. 48If one atom of an element weighs . Then, find the number of moles of atoms in of element .23 Aug, 2021 (M)Mole concept
  49. 49of acetic acid is completely neutralised using a standard solution of . The volume of ethane obtained at STP after complete electrolysis of 23 Aug, 2021 (M)Quantitative measures in chemical equations
  50. 50What amount of conc. solution should be used to prepare of ? (The concentration of solution being used is and molecular mass of )23 Aug, 2021 (M)Quantitative measures in chemical equations

Frequently Asked Questions

1.How many questions are available for Some Basic Concepts of Chemistry?

This chapter includes 108 questions compiled from AP EAMCET papers spanning 2001 to 2025.

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

These are AP EAMCET questions specifically for the Some Basic Concepts of Chemistry chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Some Basic Concepts of Chemistry an important chapter for AP EAMCET Chemistry?

Some Basic Concepts of Chemistry has appeared in 22 of the 25 years of AP EAMCET papers covered here, with 108 questions across 65 papers - about 2 per paper it appears in.

4.What is the difficulty level of Some Basic Concepts of Chemistry questions in AP EAMCET?

Of the 108 questions analysed for this chapter, 56% are easy, 42% moderate and 3% tough. 2020 had the most, with 22 questions.

5.Which topics in Some Basic Concepts of Chemistry should I focus on?

These topics have carried the most weightage in Some Basic Concepts of Chemistry:

  • Concentration terms - 44 questions (41%)
  • Quantitative measures in chemical equations - 41 questions (38%)
  • Mole concept - 17 questions (16%)
  • Quantitative measures in chemical equations has produced the most tough questions (3).
6.Is Some Basic Concepts of Chemistry's weightage in AP EAMCET going up or down?

Across all 65 papers analysed, Some Basic Concepts of Chemistry has averaged about 1.7 questions per paper. In the last three years (2022–2024), that average has fallen, at about 1.1 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.