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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Write word equation for the following skeletal equation: Na+OA2⟶NaA2O - Chemistry

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प्रश्न

Write word equation for the following skeletal equation:

\[\ce{Na + O2 ->  Na2O}\]

एक पंक्ति में उत्तर
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उत्तर

\[\ce{Sodium + Oxygen -> Sodium oxide}\]

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अध्याय 5: Language of Chemistry - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 5 Language of Chemistry
Exercise | Q 4.6

संबंधित प्रश्न

Translate the following statement into chemical equation and then balance it.

Hydrogen sulphide gas burns in the air to give water and sulphur dioxide.


2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.


Balance the given equation:

NH3 + CuO  Cu +N2 +H2O


Fill in the following blank with suitable word:

A solution made in water is known as an ........... solution and indicated by the symbol ...........

 


Balance the following chemical equation:

MnO2  +  HCI  →  MnCI2  +  CI2  +  H2O

 


Substitute formulae for names and balance the following equation:
Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.


Why do we need to balance chemical equations?


Write the chemical equation for the following word equation and balance them.

Calcium + Nitrogen → Calcium nitride


Balance the following equation:

PbS + O2 → PbO + SO2


A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – copper carbonate.


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