Practical chemistry for class 8/9/10th –
Here physics classes by Nayan jha provide Practical chemistry for class 8/9/10th whish is prepared by Rahul jha [Currently working with the St. Joseph School , Bhagalpur ( Bihar) , He is also the co-founder of QT classes bhagalpur ] .
What is electric charge ? and what are the properties of charge? To know -click here-
These practical is totally based on ICSE/CBSE/ALL STATES BOARD .
With the help of these notes, Practical chemistry for class 8/9/10th students can prepare the notes for their chemistry practical for their class examinations .
| S.No. | Name of the Experiment | page |
| 1. | To Identify HYDROGEN Gas | 2 |
| 2. | To Identify OXYGEN Gas | 3 |
| 3. | To Identify CARBON DIOXIDE Gas | 4 |
| 4. | To Identify SULPHER DIOXIDE Gas | 5 |
| 5. | To Identify HYDROGEN CHLORIDE Gas | 6 |
| 6. | To Identify AMMONIA Gas | 7 |
| 7. | To Identify NITROGEN DIOXIDE Gas | 8 |
| 8. | To Identify CHLORINE Gas | 9 |
| 9. | To Identify HYDROGEN SULPHIDE Gas | 10 |
| 10. | To Identify WATER VAPOUR
(Experiments by Heating in a dry test tube) |
11 |
What is electric current? to know complete explanation about it -click here-
Experiment No. 1
Name of the Experiment : To Identify Hydrogen gas
| No. | Experiment | Observation | Inference |
| 1 | On zinc pieces few drops of dilute sulphuric acid is added | A colourless, adourless, gas comes out | Gas may be hydrogen |
| 2 | Moist red and blue litmus paper are brought near the mouth of test tube | There is no change | Gas is neutral in nature |
| 3 | A glowing Matchstick is brought Near the mouth of the test tube | It is put off with a pop sound | Gas is hydrogen |
Reaction : Zn+ H2SO4→Zn SO4+H2
What is electric charge ? To know abot it click here-
Experiment No. : 2
Name of the Experiment : To Identify Oxygen gas
| S.No. | Experiment | Observation | Inference |
| 1. | Sodium Nitrate is heated strongly | Colourless, odourless gas comes out | Gas may be oxygen |
| 2. | Moist blue and red litmus paper is brought near the mouth of the test tube | There is no change | Gas is neutral in nature |
| 3. | A glowing splinter is brought near the mouth of the test tube | It glows more brightly | Gas is oxygen |
Reaction: 2NaNO3 2Na NO2+O2
Experiment No. : 3
Name of the Experiment : To Identify Carbon Dioxide gas
| S.No. | Experiment | Observation | Inference |
| 1. | To the aqueous solution of sodium carbonate few drops of dil. Sulphuric acid is added | Brisk effervescence is seen and a colourless, odourless gas comes out | Gas may be carbon dioxide |
| 2. | Moist blue and red litmus paper is brought near the test tube | It turns red | Gas is acidic in nature |
| 3. | Gas is passed through lime water | It turns milky | Gas may be carbon dioxide |
| 4. | An acidified potassium dichromate paper is brought near the mouth of the test tube | There is no change | Gas is carbon dioxide |
Reaction : Na2CO3+H2SO4 → Na2SO4+H20+CO2
Experiment No. 4
Name of the Experiment : To Identify Sulphur Dioxide gas
| S.No. | Experiment | Observation | Inference |
| 1. | To the aqueous solution of sodium sulphite few drops of dil. Sulphuric acid is added | A colourless gas with a pungent smell of burning sulphur comes out | Gas may be sulphur dioxide |
| 2. | A blue litmus paper is brought near the mouth of the test tube | It turns red | Gas is acidic in nature |
| 3. | Gas is passed through lime water | It turns milky | Gas may be carbon dioxide or sulphur dioxide |
| 4. | An acidified potassium dichromate paper is brought near the mouth of the test tube | It turns green | Gas is sulphur dioxide |
Reaction :Na2SO3+H2SO4→Na2SO4+H2O+SO2
Experiment No. 5
Name of the Experiment : To Identify Hydrogen chloride gas
| S.No. | Experiment | Observation | Inference |
| 1. | Sodium chloride is heated with concentrated sulphuric acid | A colourless gas with a chocking odour comes out | Gas may be hydrogen chloride |
| 2. | Moist blue and red litmus paper is brought near the mouth of the test tube | It turns red | Gas is acidic in nature |
| 3. | A glass rod dipped in concentrated ammonium hydroxide is brought near the mouth of the test tube | Dense white fumes are seen | Gas is Hydrogen chloride |
Reaction : NaCl +H2SO4 NaHSO4+HCl
Experiment No. 6
Name of the Experiment : To Identify Ammonia gas
| S.No. | Experiment | Observation | Inference |
| 1. | Ammonium chloride is gently warmed with sodium hydroxide | A colourless gas with a strong pungent smell comes out | Gas may be ammonia |
| 2. | A moist red litmus paper is brought near the mouth of the test tube | It turns blue | Gas is basic in nature |
| 3. | A glass rod dipped in concentrated hydrochloric acid is brought near the mouth of the test tube | Dense white fumes are seen | Gas is ammonia |
| 4. | A cotton wool soaked in Nessler’s reagent is brought near the mouth of the test tube | It turns deep brown | Gas is ammonia |
Reaction: NH4Cl +NaOH → NaCl +H2O +NH3
Experiment No. : 7
Name of the Experiment : To Identify Nitrogen Dioxide gas
| S.No. | Experiment | Observation | Inference |
| 1. | Copper turnings are heated Concentrated nitric acid | Reddish brown colour gas comes out | Gas may be Nitrogen dioxide |
| 2. | A moist blue litmus paper is brought near the mouth of the test tube | It turns red | Gas is acidic in nature |
| 3. | A starch iodide paper is brought near the mouth of the test tube | It turns blue-black | Gas is nitrogen dioxide |
| 4. | Potassium iodide paper is brought near the mouth of the test tube | It turns deep brown | Gas is Nitrogen dioxide |
Reaction : Cu + 4HNO3 Cu(NO3)2+ 2H2O +2NO2
Experiment No. : 8
Name of the Experiment : To Identify Chlorine gas
| S.No. | Experiment | Observation | Inference |
| 1. | A mixture of hydrogen chloride and manganese IV oxide is heated in a hard glass test tube with concentrated sulphuric acid | A greenish yellow colour gas comes out | Gas may be Chlorine |
| 2. | A moist blue litmus paper is brought near the mouth of the test tube | First it turns deep brown and then bleached | Gas is chlorine |
| 3. | A starch iodide paper is brought near the mouth of the test tube | It turns blue-black | Gas is chlorine |
Reaction : 2NaCl +3H2SO4+ MnO2 2NaHSO4 +MnSO4 + 2H2O+ Cl2
Experiment No. : 9
Name of the Experiment : To Identify Hydrogen Sulphide gas
| S.No. | Experiment | Observation | Inference |
| 1. | The aqueous solution of sodium sulphide few drops of dilute sulphuric acid is added | A colourless gas with the smell of rotten egg comes out | Gas may be hydrogen sulphide |
| 2. | A filter paper is dipped in red lead acetate and brought near the mouth of the test tube | It turns silvery-black | Gas is hydrogen sulphide gas |
Reaction : Na2S + H2SO4 → Na2SO4 +H2S
Experiment No. : 10
Name of the Experiment : To Identify Water Vapour
| S.No. | Experiment | Observation | Inference |
| 1. | Blue crystals of copper sulphate is heated in a dry test tube | A colourless, odourless, gas comes out and condenses on the colour part of the test tube form droplets of colourless liquid | Liquid may be water |
| 2. | A moist blue and red litmus paper is brought near the mouth of the test tube | There is no change | Liquid is neutral in nature
|
| 3 | Few drops of the colourless liquid is added to anhydrous copper II sulphate | The white powder turns deep blue | The residue or liquid is water |
Reaction : CuSO4. 5H2O CuSO4 +5H2O
Blue crystalline solid White anhydrous powder
Rest practicals will be uploaded soon .
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