R R Misra Solutions for Chapter: Is Matter Around Us Pure? (Elements, Compounds and Mixtures), Exercise 6: Questions as per the Guidelines of CBSE
R R Misra Chemistry Solutions for Exercise - R R Misra Solutions for Chapter: Is Matter Around Us Pure? (Elements, Compounds and Mixtures), Exercise 6: Questions as per the Guidelines of CBSE
Attempt the free practice questions on Chapter 2: Is Matter Around Us Pure? (Elements, Compounds and Mixtures), Exercise 6: Questions as per the Guidelines of CBSE with hints and solutions to strengthen your understanding. Secondary Chemistry solutions are prepared by Experienced Embibe Experts.
Questions from R R Misra Solutions for Chapter: Is Matter Around Us Pure? (Elements, Compounds and Mixtures), Exercise 6: Questions as per the Guidelines of CBSE with Hints & Solutions
Classify the following as chemical and physical change:
Burning of methane is _____ change. (Chemical/ Physical)
Name the special properties of a colloidal system which are not shown by a true solution.
A student tested the solubility of different substances in water at different temperatures and collected the data as given below.
| Substance dissolved |
Temperature in K 283 293 313 333 353 Solubility |
||||
| 1. Potassium nitrate | 21 | 32 | 62 | 106 | 167 |
| 2. Sodium chloride | 36 | 36 | 36 | 37 | 37 |
| 3. Potassium chloride | 35 | 35 | 40 | 46 | 54 |
| 4. Ammonium chloride | 24 | 37 | 41 | 55 | 66 |
The solubility values in the table are given as grams of substance dissolved in 100 grams of water to form a saturated solution. Now answer the following question:
What mass of potassium nitrate would be needed to produce its saturated solution in 50 grams of water at 313 K?
A student tested the solubility of different substances in water at different temperatures and collected the data as given below.
| Substance dissolved |
Temperature in K 283 293 313 333 353 Solubility |
||||
| 1. Potassium nitrate | 21 | 32 | 62 | 106 | 167 |
| 2. Sodium chloride | 36 | 36 | 36 | 37 | 37 |
| 3. Potassium chloride | 35 | 35 | 40 | 46 | 54 |
| 4. Ammonium chloride | 24 | 37 | 41 | 55 | 66 |
The solubility values in the table are given as grams of substance dissolved in 100 grams of water to form a saturated solution. Now answer the following question:
The student prepares a saturated solution of potassium chloride in water at 353 K and leaves the solution to cool at room temperature. What would be observed as the solution cools? Explain.
A student tested the solubility of different substances in water at different temperatures and collected the data as given below.
| Substance dissolved |
Temperature in K 283 293 313 333 353 Solubility |
||||
| 1. Potassium nitrate | 21 | 32 | 62 | 106 | 167 |
| 2. Sodium chloride | 36 | 36 | 36 | 37 | 37 |
| 3. Potassium chloride | 35 | 35 | 40 | 46 | 54 |
| 4. Ammonium chloride | 24 | 37 | 41 | 55 | 66 |
The solubility values in the table are given as grams of substance dissolved in 100 grams of water to form a saturated solution. Now answer the following question:
Find the solubility of each salt at 293 K. Which salt has the highest solubility at this temperature?
A student tested the solubility of different substances in water at different temperatures and collected the data as given below.
| Substance dissolved |
Temperature in K 283 293 313 333 353 Solubility |
||||
| 1. Potassium nitrate | 21 | 32 | 62 | 106 | 167 |
| 2. Sodium chloride | 36 | 36 | 36 | 37 | 37 |
| 3. Potassium chloride | 35 | 35 | 40 | 46 | 54 |
| 4. Ammonium chloride | 24 | 37 | 41 | 55 | 66 |
The solubility values in the table are given as grams of substance dissolved in 100 grams of water to form a saturated solution. Now answer the following question:
What is the effect of change of temperature on the solubility of a salt?
Describe the steps to separate each component from a mixture containing iron filings, sulphur, sodium chloride and sand.
Define a colloid and write its other names. Give an example of each one of:
(a) sol
(b) emulsion
(c) gel
(d) aerosol
