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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Balance the Following Equation. Also Name the Product Formed. Zn + Hci → Znci _2 +H_2 - Chemistry

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प्रश्न

Balance the following equation. Also name the product formed. 

`"Zn" + "HCI" →  "ZnCI" _2 + "H"_2`

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उत्तर

`"Zn" + "HCI" →  "ZnCI" _2 + "H"_2`  Zinc chloride, Hydrogen 

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अध्याय 5: Language of Chemistry - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 5 Language of Chemistry
Additional questions | Q 5.1

संबंधित प्रश्न

Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:

Indicator Colour change Inference
Methyl Orange No change ......................
.................... Acid
Yellow .......................

Balance the following equation. Also name the product formed. 

`"KCIO"_3 →  "KCI" +"O"_2`


What is a chemical equation? Why it is necessary to balance it?


What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2


Choose the correct answer from the options given below.

The formula of sodium carbonate is Na2CO3 and that of calcium hydrogen carbonate is


Write the balanced chemical equation of the following reaction.

potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.


\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of acid required.


A student mixes sodium sulphate powder in barium chloride powder. What change would the student observe on mixing the two powders? Justify your answer and explain how he can obtain the desired change.


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.


Give reason for the following:

Silver salts are kept in dark coloured bottles.


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