हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

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

Advertisements
Advertisements

प्रश्न

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

2Mg + O2 → 2MgO

एक पंक्ति में उत्तर

उत्तर

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

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 5: Language of Chemistry - Additional questions

APPEARS IN

सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 5 Language of Chemistry
Additional questions | Q 8.2

संबंधित प्रश्न

FILL IN THE BLANK

A .............. change is a temporary change.


FILL IN THE BLANK

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


TRUE \ FALSE

Positively charged electrode is called the anode. True or false ?


Write a short note on the information derived from a balanced chemical equation.


Write true or false :

When potassium iodide solution is added to lead acetate solution a red precipitate is formed.


State what you would observe when the following substance is heated in a glass test tube red lead.


Explain the following reaction with one suitable example of Decomposition reaction


Explain the following reaction with one suitable example of Double decomposition reaction.


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

Fe2O3 + 2Al → Al2O3 + 2Fe


Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition) 

Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.


What do you understand by precipitation reaction? Explain with examples.


Give examples of exothermic reactions i.e. heat evolved in each of the following:

(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.


Give balanced equation for the following conversion affected by heat alone on the substance:

Hydrated copper sulphate to sulphur dioxide


Match the chemical reactions in List I with the appropriate answer in List II.

  List I   List II
1. \[\ce{XY⇌[heat]X + Y}\] A: Displacement reaction
2. \[\ce{XY->X + Y}\] B: Double decomposition
3. \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] C: Endothermic reaction
4. \[\ce{X + YZ->XZ + Y}\] D: Thermal dissociation
5. \[\ce{X + Y->[heat]XY -\Delta}\] E: Decomposition reaction

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

Calcium hydroxide.


What happens when cane sugar is strongly heated? Mention any two changes in it.


NPK are the primary nutrients for plants.


The chemical change is ______.


Limestone contains ______ mainly.


_____ is the basic material to manufacture urea.


Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.


What is the use of indicator?


Classify the following as physical or chemical properties

Most metal oxides form alkalis on interacting with water.


Classify the following processes into physical or chemical changes:

(i) Beating of aluminium metal to make aluminium foil.

(ii) Digestion of food.

(iii) Cutting of a log of wood into pieces.

(iv) Burning of crackers.


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

Can you change rust back into iron by some simple method?


Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.


How can we prevent rusting?


______ is the chemical name of rust.


Acid rain is a result of ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×