Practical chemistry for class 8/9/10th

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  ] .

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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

 

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 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

 

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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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