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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Write the missing reactants and products and balance the equations. KClOA3→heat ___________+ ____________

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प्रश्न

Write the missing reactants and products and balance the equations.

\[\ce{KClO3 ->[heat]}\] ___________+ ____________

एक पंक्ति में उत्तर
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उत्तर

\[\ce{2KClO3 ->[heat] 2KCl + 3O2}\]

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अध्याय 6: Chemical Reactions - Exercise 2 [पृष्ठ ८६]

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सेलिना Concise Chemistry [English] Class 8 ICSE
अध्याय 6 Chemical Reactions
Exercise 2 | Q 5.2 | पृष्ठ ८६

संबंधित प्रश्न

State whether the following statement is true or false. In case a statement is false, write the corrected statement.

Condensation of steam is not a chemical change.


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


FILL IN THE BLANK

In a double decomposition precipitation reaction both the reactants must be ............ soluble.


FILL IN THE BLANK

In a ............ change, new substances are formed.


                                    MATCH THE COLUMNS

1 . `H_2` + `CI_2` `→` 2HCI    a. displacement reaction
2. `2FeCI_3`+ `H_2`  `→` `2FeCI_2` +2HCI` b. addition of an electronegative redical 
3. Fe + `CuSO_4` `→``FeSO_4` +Cu`  c. removal of an electronegative redical 
4. `2H_2O` +`4NO_2`+`O_2` `→` `4HNO_3` d.reduction by adding hydrogen
5. 3Fe +`3CI_2` `→` `2FeCI_3` e.electrolysis of water
6. `FeCI_3`+ 3NaOH `→``Fe(OH)_3``↓`+NaCI F.double decomposition,precipitation reaction
7.`2H_2O` `→` `2H_2``↑`+`O_2` e. combination or synthesis reaction

 


TRUE \ FALSE

Ammonia is a good oxidizing agent.


Define electrolysis.


Fill in the blank:
The substances which undergo chemical change are called _______


Fill in the blank:

The basic conditions necessary for a chemical reaction is _______


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Sodium chloride


Give an example of the following chemical change.

Two gases combine to form white solid


Distinguish by dilute sulphuric acid.

Copper and magnesium?


Give reason for the following:

The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌} 
between the reactants and products, formed in the chemical reaction.


State the following reaction represent oxidation or reduction.

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


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

Ammonium dichromate.


What kind of a change is associated with decaying of a plants?


______ is not a chemical change.


Which of the following is not an “element + element → compound” type reaction?


A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?


Heat may evolve or be absorbed during a ______ change.


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