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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Complete and Balance the Following Chemical Equations Na + H_2 O→

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प्रश्न

Complete and balance the following chemical equations

Na + H2 O →

एक पंक्ति में उत्तर
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उत्तर

\[\ce{Na + H2O→2NaOH + H2↑}\]

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अध्याय 6: Chemical Reactions - Exercise 1 [पृष्ठ ७३]

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सेलिना Concise Chemistry [English] Class 8 ICSE
अध्याय 6 Chemical Reactions
Exercise 1 | Q 6.3 | पृष्ठ ७३

संबंधित प्रश्न

Give reason.

Acidic soil is treated with quick lime.


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

How is a strong electrolyte different from a weak electrolyte?


Fill in the blank:
The substances formed as a result of a chemical reaction are called _______


State four conditions necessary for a chemical reaction to take place.


State what you would observe when the following substance is heated in a glass test tube red lead.


Write the chemical reaction where the following changes are observed.

Gas is evolved


What do you observe? When

Water is added to the quick lime.


Give a chemical test to distinguish between the following gases. 

H2 and O2


Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.


Give a word equation for the following reaction.

A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.


Complete the table given below.

Heat on ammonium dichromate Name of neutral gas evolved  

Match the chemical reactions in List I with the appropriate answer in List II.

  List I   List II
1. \[\ce{XY⇌[heat]X + Y}\] A: Displacement reaction
2. \[\ce{XY->X + Y}\] B: Double decomposition
3. \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] C: Endothermic reaction
4. \[\ce{X + YZ->XZ + Y}\] D: Thermal dissociation
5. \[\ce{X + Y->[heat]XY -\Delta}\] E: Decomposition reaction

State the following reaction represent oxidation or reduction.

\[\ce{Cu++->Cu}\]


Explain the term chemical reaction with special reference to reactants and products.


Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.


Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.


The percentage composition of Nitrogen in Ureas is ______.


Both CO2 and H2 gases are ______.


______ is the chemical name of limestone.


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