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Name: a Greenish-yellow Gas. - Chemistry

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प्रश्न

Name: A greenish-yellow gas.

एक शब्द/वाक्यांश उत्तर

उत्तर

Chlorine

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पाठ 9: Practical Work - Exercise 9 (A) [पृष्ठ १४२]

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सेलिना Concise Chemistry [English] Class 9 ICSE
पाठ 9 Practical Work
Exercise 9 (A) | Q 6.4 | पृष्ठ १४२

संबंधित प्रश्‍न

The chemical name of baking soda is ______.


Complete and balance the following chemical equations:

Zn + `"H"_2"SO"_4`  `→`

           (dil)


What do you observe when Iron nail is kept in copper sulphate solution for sometime.


MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

Compounds, which in their molten state allow an electric current to pass through them are called

  1. electrolytes
  2. non-electrolytes
  3. non-conductors
  4. none of these

What are biocatalysts ?


Explain by writing a word equation.

Hard water gets softened on mixing with a solution of washing soda.


State the conditions necessary for a chemical change or reaction.


Define the following terms

Precipitate


What do you observe? When

Barium chloride is added to sodium sulphate solution


Define:
 Photochemical reaction
Give one example 


Complete the following table and write your observations.

 

Hydrogen sulphide

Ammonia

Sulphur dioxide

Hydrogen chloride

Shake the gas with red litmus solution

       

Shake the gas with blue litmus solution

       

Apply a burning splint to a gas

       

State the original colour of the following substance and colour of residue obtained after heating.

Lead nitrate


Distinguish by heating the following in dry test tubs.

Zinc nitrate and copper nitrate.


Select the correct answer for the following options:

The gas obtained when potassium chlorate is heated in the presence of a catalyst.


What happens when cane sugar is strongly heated? Mention any two changes in it.


Explain the following statement: Digestion is a chemical change.


Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.


Water boiling into water vapour is an example of chemical change.


Which of the following statement is incorrect for a chemical reaction?


Rusting of iron is  ______.


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