हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

What Are Oxides ?

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प्रश्न

What are oxides ? 

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उत्तर

An oxide is a compound which essentially contains oxygen in its molecule, chemically combined with a metal or a non-metal

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अध्याय 6: Chemical Reactions - Exercise 2 [पृष्ठ ८६]

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सेलिना Concise Chemistry [English] Class 8 ICSE
अध्याय 6 Chemical Reactions
Exercise 2 | Q 10.1 | पृष्ठ ८६

संबंधित प्रश्न

How do the following help in bringing about a chemical change?

heat. 


Explain the type of reactions on the basis of the direction of reaction.


Fill in the blank.

Melting of ice is a _______ change.


Write true or false .
A black residue is formed when sugar is heated .


Balance the following equation :

Fe + H2O → Fe3O4 + H2


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


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Hydrogen chloride


Give an example of the following chemical change.

Two gases combine to form white solid


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

Ammonium chloride 


Distinguish by dilute sulphuric acid.

Sodium sulphide and sodium sulphite?


Give a word equation for the following reaction.

Two solids which combine on heating, to give a liquid.


State the following reaction represent oxidation or reduction.

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


Complete the statement by filling in the blank with the correct word:

The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.


______ gas causes tears in our eyes while cutting onions.


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


Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings


The chemical name of baking soda is sodium bicarbonate.


Match the following:

  Column I   Column II
1. Burning of coal a. Rusting
2. Painting of a surface b. Evaporation
3. Dipping iron in the water c. Chemical change
4. Salt from seawater d. Prevention of rusting

Chemical changes are important in our day-to-day life. Give examples.


Acid rain is a result of ______.


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