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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Representation of the Results of a Chemical Change – is a Chemical Equation. Answer the Following: What is the Indications of the Arrow Between the Reactants and the Products and - Chemistry

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प्रश्न

Representation of the results of a chemical change – is a chemical equation.

For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓

Answer the following:

What is the indications of the arrow between the reactants and the products and of the arrow pointing downwards at the end.

टीपा लिहा

उत्तर

  1. The function of the arrow(→)between the reactants & products is that it represents the chemical reaction taken place between two reactants.
  2. Arrow pointing downwards (↓) at the end shows the precipitate formed in the chemical equation.
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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Language of Chemistry - Exercise

संबंधित प्रश्‍न

Give one example of an exothermic reaction.


When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming a product Y. A suspension of Y in water is applied to the walls of a house during white washing. A clear solution of Y is also used for testing carbon dioxide gas in the laboratory.
(a) What could be solid X? Write its chemical formula.
(b) What could be product Y? Write its chemical formula.
(c) What is the common name of the solution of Y which is used for testing carbon dioxide gas?
(d) Write chemical equation of the reaction which takes place on adding water to slid X.
(e) Which characteristic of chemical reactions is illustrated by this example?


Write word equation for the following skeletal equation:

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]


When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.

Write the balanced chemical equation for this reaction.


In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:

Copper [II] sulphate to sodium hydroxide.


Representation of the results of a chemical change – is a chemical equation.

For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓

Answer the following:

Name the reactants and the products in the above equation.


Balance the following simple equation:

NO   +   O2  →  NO2 


Balance the following simple equation:

KBr  +  Cl2  → KCl  +  Br2


Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

6NaOH + 3Cl2 → 6NaCl + NaClO3 + 3H2O


Writing a chemical reaction in brief by using chemical formulae is called as _______.


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