English

What Are Oxides ?

Advertisements
Advertisements

Question

What are oxides ? 

Advertisements

Solution

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

shaalaa.com
  Is there an error in this question or solution?
Chapter 6: Chemical Reactions - Exercise 2 [Page 86]

APPEARS IN

Selina Concise Chemistry [English] Class 8 ICSE
Chapter 6 Chemical Reactions
Exercise 2 | Q 10.1 | Page 86

RELATED QUESTIONS

MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

Compounds, which in their molten state allow an electric current to pass through them are called

  1. electrolytes
  2. non-electrolytes
  3. non-conductors
  4. none of these

Fill in the blank:

In some chemical reactions an insoluble ________ is formed when two solutions are mixed.


Balance the following equation :

Fe + H2O → Fe3O4 + H2


Give an example of the following chemical change.

Two solids combine to form a liquid


Explain,giving one example of the following chemical changes:

Reversible reaction


Multiple choice:

A reaction of a type: AB + CD → AD + CD, involves


Complete and balance the following reaction:

\[\ce{NH3 + O2 ->[\Delta]}\]


Name: A greenish-yellow gas.


Complete the table given below.

Heat on iodine crystals Colour of vapours evolved  

Complete the table given below.

Heat on sodium chloride Colour imparted to flame during flame test  

State the following reaction represent oxidation or reduction.

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


Limestone contains ______ mainly.


Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.


______ is a natural indicator.


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?


Rusting of iron is  ______.


______ occurs in the absence of air and in the presence of micro-organisms such as yeast.


Which is used as a catalyst during the process of hydrogenation of oils?


Define the following term:

Chemical change


Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×