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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Complete and Balance the Following Chemical Equations: - Chemistry

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प्रश्न

Complete and balance the following chemical equations:

Zn + `"H"_2"SO"_4`  `→`

           (dil)

एक पंक्ति में उत्तर
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उत्तर

Zn + `"H"_2"SO"_4`  `→`  Zn `"SO"_4`  + `"H"_2` 

           (dil)

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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 6.5 | पृष्ठ ७३

संबंधित प्रश्न

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.


Complete and balance the following chemical equations:

Ba`"CI"_2`   +  `"H"_2"SO"_4`   `→`

    (aq.)           (aq.)


Fill in the blank.

Melting of ice is a _______ change.


Name the type of chemical reaction shown by the following equation:

NaOH + HCl → NaCl + H2O


When electric current is passed through acidulated water ______ of water takes place. 


Define the following term:

Precipitate


Give an example of the following chemical change.

Two solids combine to form a liquid


Complete and balance the following reaction:

\[\ce{CuCO3 ->[\Delta]}\]


What do you observe when Cl2 is passed through potassium iodide (KI) solution.


Write your observation and a balanced equation in the case of the following substances being heated.

Ammonium dichromate.


Distinguish by dilute sulphuric acid.

Sodium sulphide and sodium sulphite?


Give a word equation for the following reaction.

An exothermic reaction where both the reactants are gases, one of which is oxygen.


Complete the table given below.

Heat on ammonium dichromate Name of neutral gas evolved  

Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Calcium hydroxide.


________ is a chemical substance which alters the speed of a chemical reaction.


When an aqueous solution of potassium chloride is added to an aqueous solution of silver nitrate, a white precipitate is formed. Give the chemical equation of this reaction.


Arrange the following statements in correct sequence:

  1. One side is water-loving and other water-hating molecules.
  2. When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
  3. The dirt surrounded by the detergent molecules floats in the water making it dirty.
  4. Finally, the cloth is clean.
  5. The detergent molecules have two sides.
  6. Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.

Classify the following as physical or chemical properties

Most metal oxides form alkalis on interacting with water.


Iron and rust are the same substances.


Which is used as a catalyst during the process of hydrogenation of oils?


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