Chemistry Class 12th : Unit Wise Important Questions Based on NCERT Textbook - Useful for Upcoming Exams
UNIT 1 Solution
Q. 1 Multiple choice question 1. The law of solubility of gases in liquids was given
a. Want Hoff b. Berkeley c. Boyle d. by henry
2. is brass
a. solid solution b. Liquid solution c. gas solution d. colloidal solution
3. Molecular property is not
a. Boiling point elevation b. Vapor pressure c .freezing depression d. Osmotic Pressure
4. The number of moles of solute present in 1000 g of solvent is called
a. Molarity b. Molality c. Normality d. formality
Q. Fill in the 2 blanks
1. An ideal solution is one which obeys the rule under all circumstances. ,
2. Solutions having same osmotic pressure are called------- solutions.
3. Molecular property depends on the number of particles of --------- in a given volume of solution.
4---------- No more amount of solute can be dissolved in the solution at a fixed temperature.
MATCH MAKING
1 . Solution of a gas in a liquid a. ideal solution
2. Solution of solid in gas b. Particle number of solute
3. Molecular Properties c. concentrated solution
4. Following Raoul's law d. smoke
5 Excess amount of solute e. soda water
Q. 4. Answer in one word / sentence
1. When the amount of solute in the solution is less, then the solution is called.
The number of gram equivalents of solute in 2 liter of solution is called.
3. Properties that depend on the number of particles of the solute.
4. The number of moles of any component of the solution and the total number of moles of all the components of the solution is called the ratio of the number of
5. Solution which is distilled at the same temperature without changing the composition.
very short answer questions
1. What is a solution called?
2. Classify the solution on the basis of concentration.
3. On what factors does the solubility of liquids in gases depend? write
4. What is abnormal molecular weight? 1
5. What is an isotropy solution called?
short answer questions
1. Write the definitions of Gram molecular elevation constant and Gram molecular depression constant.
2. What is called isotropism solution.
3. What is the role of molecular interaction in a solution of alcohol and water?
4. Define molarity and molality with units.
5. Explain Henry's law with examples.
6. Explain atomic property with examples.
7. If 120 grams of NaOH is dissolved in 2 liters of solution, then the molarity of the solution
Find out. 8. If 6 grams of urea is dissolved in 72 grams of water, then find the mole fraction of urea.
Do it.
9. If 122 grams of carbon tetrachloride is washed off in 22 grams of benzene, then calculate the mass percentage of benzene and carbon tetrachloride.
10. Define osmosis and osmotic pressure.
11. What is the reason that with increase in temperature, gases become less soluble in liquids?
12. What are the molecular properties called? Give four examples.
13. Define hypertonic and hypotonic solution.
14. Explain the factors affecting solubility..
15. Who is called Mole fraction?
long answer questions
1. Write Raoult's law of vapor pressure depression. Write the limitations of Raoult's law.
2. Generally, when a solute is dissolved in a solvent, its boiling point increases, why?
Explain with reason.
3. Why does adding a volatile solute to a solvent lower its vapor pressure?
Are? Explain.
4. Find the mole fraction of both in a mixture of 72 g of water and 92 g of ethyl alcohol.
5. Describe the factors affecting the solubility of a solid in a liquid.
6. Write the difference between positive deviation and negative deviation.
7. Write the decreasing depression in the freezing point of water by taking equal amounts of acetic acid, trichloro acetic acid and trifluoro acetic acid.
8. Explain Raoult's law? How can the excess of non-volatile solute be found with its help?
9. Explain the difference between ideal and ideal solution.
---------------respectively
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