Advertisements
Advertisements
Question
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
Advertisements
Solution
\[\ce{\underset{\text{quick lime}}{CaO} + H2O ->\underset{\text{slaked lime}}{Ca(OH)2}}\]
APPEARS IN
RELATED QUESTIONS
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
FILL IN THE BLANK
In a ............ change, new substances are formed.
FILL IN THE BLANK
Positively charged ions are called ........
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
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.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
Circle the odd one out. Give reason for your choice
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
Limestone contains ______ mainly.
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
Give two examples for the following case:
Chemical changes
Write a note on the following:
Curdling of milk
