Advertisements
Advertisements
Question
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
Advertisements
Solution
2Mg + O2 → 2MgO => Combination reaction.
APPEARS IN
RELATED QUESTIONS
How is a strong electrolyte different from a weak electrolyte?
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
Copper carbonate when heated, it turns :
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.
Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| d. | Dissolution of salt in water | iv. | Covalent bond |
| e. | Carbon | v. | Ionic bond |
| f. | Fluorine | vi. | Physical change |
| g. | Magnesium | vii. | Tendency to form anion |
What is a chemical reaction?
Define a photochemical reaction.
Give reason for the following:
Silver nitrate solution is kept in coloured bottles.
Give reason for the following:
Colourless concentrated sulphuric acid in a test tube changes to blue on adding a small piece of copper to it.
What do you observe? When
Sodium chloride solution is added to silver nitrate solution.
Name: Two carbonates do not produce carbon dioxide on heating.
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Give a suitable example with an equation to show the representation of a chemical reaction.
Which of the following is not an “element + element → compound” type reaction?
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
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?
When carbon dioxide is passed through lime water ______.
