Solutions: Class 12 Chemistry (UP Board) important questions and practice
Solutions is chapter 1 of 10 in UP Board Class 12 Chemistry. Below are the topics the paper draws from, the question types that come up again and again, and a free practice test on this chapter alone.
Topics in this chapter
- Types of solutions and concentration terms: molarity, molality, mole fraction, mass percentage, ppm
- Solubility of gases in liquids: Henry's law
- Vapour pressure of liquid solutions: Raoult's law
- Ideal and non-ideal solutions; positive and negative deviations; azeotropes
- Colligative properties: relative lowering of vapour pressure, elevation of boiling point, depression of freezing point, osmotic pressure
- Abnormal molar mass and van't Hoff factor
What examiners usually ask
- Calculate the molar mass of a solute when 1.0 g dissolved in 50 g of benzene lowers the freezing point by 0.40 K (Kf = 5.12 K kg/mol)
- What are azeotropes? Differentiate between minimum boiling and maximum boiling azeotropes with examples
- Define van't Hoff factor and explain how it accounts for dissociation and association; what is i for K2SO4 if fully dissociated?
Exam tip
Colligative property numericals appear in almost every paper; convert grams to moles carefully, use molality (not molarity) for boiling and freezing point problems, and remember that osmotic pressure uses molarity and gives the most accurate molar masses for polymers.
Solutions on other boards and exams
Frequently asked questions
What are the important questions from Solutions for UP Board Class 12?
The question types listed above repeat most often in UP Board Class 12 Chemistry papers for this chapter. Practise them with the chapter test and then attempt them inside a full previous-year paper under time.
Is Solutions in the UP Board Class 12 Chemistry syllabus?
Yes. Solutions is part of the current UP Board Class 12 Chemistry syllabus, as listed on this site from the prescribed textbook.
Can I practise Solutions MCQs in Hindi?
Yes. The chapter test and explanations are available in Hindi and English, with an AI doubt solver for any question.