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

S.P. Singh Concise Chemistry [English] Class 8 ICSE
Chapter 6 Chemical Reactions
Exercise 2 | Q 10.1 | Page 86

RELATED QUESTIONS

Complete and balance the following chemical equations:

`"H"_2"S"` + `"CI"_2`  `→`  


Complete and balance the following chemical equations:

Ba`"CI"_2`   +  `"H"_2"SO"_4`   `→`

    (aq.)           (aq.)


FILL IN THE BLANK

Negatively charged ions are called ..........


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)

Chlorine (Cl2) molecule is formed by ______ of electrons between two chlorine atoms.


When electric current is passed through acidulated water ______ of water takes place.


Complete and balance the following reaction:

Pb(NO3)2 + KI →


Name: A brown gas 


State the original colour of the following substance and colour of residue obtained after heating.

Ammonium dichromate


Give a chemical test to distinguish between the following gases. 

HCl and Cl2


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

Ammonium dichromate.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.


Complete the table given below.

Addition of dil. H2SO4 to zinc  Test for gas evolved  

Complete the table given below.

Heat on sodium chloride Colour imparted to flame during flame test  

Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.


Limestone contains ______ mainly.


A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?


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?


Give an example where heat, light, and sound are produced during a chemical change.


What is thermochemical reactions?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×