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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Name the Type of Chemical Reaction Shown by the Following Equation : Fe2o3 + 2al → Al2o3 + 2fe - Chemistry

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प्रश्न

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

Fe2O3 + 2Al → Al2O3 + 2Fe

एक पंक्ति में उत्तर

उत्तर

Fe2O3 + 2Al → Al2O3 + 2Fe  => Displacement 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 8.5

संबंधित प्रश्न

Fill in the blanK

 A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.


MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

 

Miscible liquids having slightly different boiling points can be separated by the

  1. evaporation
  2. distillation
  3. fractional distillation
  4. sedimentation

TRUE \ FALSE

Electrolytic refining is a method in which a thin coating of a metal is done over another metal.


How is a strong electrolyte different from a weak electrolyte?


Balancing a chemical equation is based on


Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

Rusting of iron is a ______ chemical change. 


Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

Electron ______ is complete in each hydrogen in a hydrogen molecule.


Give an example of a reaction where the following are involved:

Solution


Give an example of the following chemical change.

A reaction where colour change is noticed


Write the chemical reaction where the following changes are observed.

Physical state is changed


Multiple choice:

Thermal decomposition of sodium carbonate will produce


Give a chemical test to distinguish between the following gases. 

HCl and Cl2


Give a chemical test to distinguish between the following gases. 

NH3 and SO2


Distinguish by heating the following in dry test tubs.

Zinc nitrate and copper nitrate.


Give a word equation for the following reaction.

A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.


State the following reaction represent oxidation or reduction.

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


State the following reaction represent oxidation or reduction.

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


A chemical reaction is often accompanied by external indications or characteristics.


NPK are the primary nutrients for plants.


Photosynthesis is a chemical reaction that takes place in the presence of ______.


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


Burning of paper is the best example of ______ change.


The water we drink is a combination of hydrogen and oxygen.


Classify the following as physical or chemical properties

Most metal oxides form alkalis on interacting with water.


Write word equations for two chemical reactions with the help of materials given in the box.

Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water


The chemical name of baking soda is sodium bicarbonate.


Magnesium + oxygen → magnesium oxide.

2Mg + O2 → 2Mg O


Write the equation for the process of formation of rust.


Write the characteristics of chemical change.


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