Class 12 Chemistry Important Questions | Chapter 2 Solutions

Here we have a given Class 12 Chemistry Important Questions for Maharashtra Board HSC Examination 2024. Every students want to score good marks in Class 12 Board Exam,but number of students don't know how to score good marks. Dear students, following given questions had been asked in earlier HSC Board Examinations. From this post, you will know which type of questions had been asked in earlier Board Exams and same questions or same type of questions will be asked in your upcoming examination. If you study all these questions, you will get very good marks in your board examinations, Because so many questions from the following given questions will be asked in your upcoming examination.Therefore go through our Class 12 Chemistry Important Questions which are given in chapter-wise manner and simply try to solve these questions to score very good marks in Chemistry and obviously, you will! Best wishes to all dear students for your upcoming Maharashtra State Board Exam 2024.

Class 12 Chemistry Important Questions

Class 12 Chemistry Important Questions | Chapter 2 Solutions

• State and explain van't Hoff-Boyle's law. (March 2008).

• Define 'Mole fraction'. (March 2008)

• Define 'Colligative properties'. (Oct. 2008)

• Mention different ways of expressing concentration of a solution. (Oct. 2008) 

• State and explain the van't Hoff Charle's law. (March 2009)

• Define : Isotonic solution. (March 2009)

• State van't Hoff-Avogadro's law. (March 2009)

• Define : Ebullioscopic constant. (Oct. 2009)

• State and explain van't Hoff Avogadro's law. (Oct.2009, March 2011)

• Define : Solution. (Oct. 2009, March 2011)

• Derive van't-Hoff equation for dilute solution. (March 2010, March 2011)

• Define osmotic pressure. Derive an equation for determination of molecular weight from osmotic pressure. (Oct. 2010)

• Define a solution. Explain the terms solute and solvent. (March 2011) 

• Derive the relationship between relative lowering of vapour pressure and molar mass of non-volatile solute. (March 2013)

• Calculate the mole fraction and molarity of HNO2, in a solution containing 12.2% HNO2. (Given- atomic masses: H = 1, N = 14, O = 16) (March 2013)

• Define osmosis. (March 2013)

• Calculate molarity and molality of 6.3% solution of nitric acid having density 1.04 g/cm3. (H = 1, N = 14, O = 16) (Oct. 2013)

• State Henry's law. How does solubility of a gas in water varies with the temperature? (Oct. 2013)

• Define isotonic solutions. (Oct. 2013)

• What is boiling point? (March 2013)

• Calculate the amount of CaCl2, (van't Hoff factor, i = 2.47) dissolved in 2.5 L solution so that its osmotic pressure at 300K is 0.75 atmosphere. Given: Molar mass of CaCl2 is 111 g. mol-1. R = 0.082 L. atm K-1 mol-1. (March 2014)

• Explain, why do aquatic animals prefer to stay at lower level of water during summer? (March 2014)

• A solution containing 0.73 g of camphor (molar mass 152 g.mol-1) in 36.8 g of acetone (boiling point 56.3°C) boils at 56.55°C. A solution of 0.564 g of unknown compound in the same weight of acetone boils at 56.46°C. Calculate the molar mass of the unknown compound. (Oct. 2014)

• Define van't Hoff factor. How is it related to the degree of dissociation? (Oct. 2014) 

• Define: Cryoscopic constant. (Oct. 2014)


• Derive van't Hoff general solution equation. (March 2015) 

• 1.0 x 10-3 kg of urea when dissolved in 0.0985 Kg of a solvent, decreases freezing point of the solvent by 0.211 K. 1.6 x 10-3 kg of another non-electrolyte solute when dissolved in 0.086 g of the same solvent depresses the freezing point by 0.34 K. Calculate the molar mass of the another solute. (Given Molar mass of urea = 60) (March 2015)

• Define boiling point. Write the formula to determine molar mass of a solute using freezing point depression method. (March 2016)

• The vapour pressure of pure benzene is 640 mm of Hg. 2.175 x 10-3 kg of non volatile solute is added to 39 gram of benzene. The vapour pressure of solution is 600 mm of Hg.  Calculate molar mass of solute (C = 12, H = 1) (March 2016)

• Derive the relationship between relative lowering of Vapour pressure and molar mass of solute. (March 2017)

• A solution of a substance having mass 1.8 x 10-3 kg has the osmotic pressure of 0.52 atm at 280 K. Calculate the molar mass of the substance used.(Volume = 1 dm3, R = 8.314 J K-1mol-1. 
(March 2017) 

• The boiling point of benzene is 353.23 K.  When 1.80 gram of non-volatile solute was dissolved in 90 gram of benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of solute. (Kb for Benzene is 2.53 K/mol) (March 2017)

• What is molal elevation constant does it depends upon nature of solute and nature of solvent. (March 2019)

• 0.01 molal aqueous solution of K3[Fe(CN)6] freezes at 0.0520 K. Calculate van't Hoff factor and degree of dissociation (Given K for water = 1.86 K kg/mol) (March 2019)

• Define :
(a) Molality
(b) Osmotic pressure (March 2020)

• Derive the mathematical expression between molar mass of non volatile solute and elevation of boiling point. State and explain van't Hoff -  Avogadro's law (March 2020)

• What is the concentration of dissolved oxygen at 50°C under pressure of 1 atm, if partial pressure of oxygen at 50°C is 0.14 atm. (Henry's law constant for oxygen = 1.3 x 10-3 mol dm-3 atm-1) (March 2020)

• Derive the expression to calculate molar mass of non volatile solute by osmotic pressure measurement. (March 2022)

• Define the following terms :
i) Isotonic solution 
ii) Osmosis (March 2022)

• Henry's law constant for CH3Br is 0.159 moldm-3 bar-1 at 25°C. What is solubility of CH3Br in water at same Temperature and partial pressure of 0.164 bar? (March 2022)

• Write the SI unit of cryoscopic constant. (March 2023)

• Calculate the mole fraction of solute, if the vapour pressure of pure benzene at certain temperature is 640 mmHg and vapour pressure of solution of a solute in benzene is 600 mmHg. (March 2023)

• Define Osmosis. How will you determine molar mass of non volatile solute by elevation of boiling point? (March 2023)


👉 Students are suggested to go through our Class 12 Chemistry Important Questions to score more in your upcoming 2024 Board Examination. ðŸ‘‡ðŸ‘‡

Class 12 Chemistry Important Questions Chapter-wise

 Click on the following links to get Class 12 Chemistry Important Questions.👇👇 

• Chapter 1 - Solid States

• Chapter 2 - Solutions



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