CBSE Class 12 Chemistry Solid State (3). CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.
1 MARK QUESTIONS
1 What is molarity?
2 What do you understand by saying that molality of a solution is 0.2?
3 Why is the vapour pressure of a liquid remains constant at constant temperature?
4 Define Azeotropes?
5 Which substance is usually added into water in the car radiator to act as antifreeze?
6 Which liquids form ideal solution?
7 Which property of solution depend only upon the number of moles of solute dissolved and not on the
nature of the solute?
8 Write one example each of solid in gas and liquid in gas solution?
9 What is molal elevation constant or ebullioscopic constant?
10 Define van’t Hoff factor.
11 Two liquids A and B boil at 120 C and 160 C respectively. Which of them has higher vapour pressure at 70 C?
12 What happens when blood cells are placed in pure water?
13 What is the effect of temperature on the molality of a solution?
14 Write Henry’s law.
15 What is an antifreeze?
16 Why cutting onions taken from the fridge is more comfortable than cutting onions lying at room temperature?
17 What will be the van’t Hoff factor for O.1 M ideal solution?
18 What is the optimum concentration of fluoride ions for cleaning of tooth?
19 What role does the molecular interaction play in the solution of alcohol and water?
20 Henry law constant for two gases are 21.5 and 49.5 atm, which gas is more soluble .
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