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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Name the Type of Chemical Reaction Shown by the Following Equation: 2mg + O2 → 2mgo - Chemistry

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प्रश्न

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

2Mg + O2 → 2MgO

एक पंक्ति में उत्तर
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उत्तर

2Mg + O2 → 2MgO  => Combination reaction.

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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 8.2

संबंधित प्रश्न

FILL IN THE BLANK

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


FILL IN THE BLANK

The new substances formed during a chemical reaction are called the ..................


Define electrolysis.


Write true or false  : 

Hydrogen sulphide has rotten egg smell .


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

CaCO3 → CaO + CO2


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

NaOH + HCl → NaCl + H2O


Write the chemical reaction where the following changes are observed.

Precipitate is formed


State the type of reactions for the following represent and balance the ones that are not balanced.

NaOH + HCl → NaCl + H2O


Give an example of a photochemical reaction.


What do you observe when HCI is passed through a silver nitrate solution.


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

Zinc carbonate.


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.


Name the following:

The products obtained during ‘photosynthesis’ – which is a chemical change.


Differentiate between the following:

Neutralization reaction and a precipitation reaction.


Silver metal can displace hydrogen gas from nitric acid.


Analogy:

H2O: Water:: NaCl: ______.


Classify the following as physical or chemical properties

Most metal oxides form alkalis on interacting with water.


Which of the following statement is incorrect for a chemical reaction?


If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Do you think formation of rust from iron is a chemical change?


Photosynthesis is a chemical charge. Justify your answer.


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