Advertisements
Advertisements
प्रश्न
Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.
Advertisements
उत्तर
Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of double displacement reaction.
Explanation:
On addition of ZnSO4 and BaCl2, the following reaction takes place:
In the reaction, the exchange of ions occurs. The reaction in which ions exchange to form a precipitate is called a double displacement reaction.
APPEARS IN
संबंधित प्रश्न
MATCH THE COLUMNS
| 1 . `H_2` + `CI_2` `→` 2HCI | a. displacement reaction |
| 2. `2FeCI_3`+ `H_2` `→` `2FeCI_2` +2HCI` | b. addition of an electronegative redical |
| 3. Fe + `CuSO_4` `→``FeSO_4` +Cu` | c. removal of an electronegative redical |
| 4. `2H_2O` +`4NO_2`+`O_2` `→` `4HNO_3` | d.reduction by adding hydrogen |
| 5. 3Fe +`3CI_2` `→` `2FeCI_3` | e.electrolysis of water |
| 6. `FeCI_3`+ 3NaOH `→``Fe(OH)_3``↓`+NaCI | F.double decomposition,precipitation reaction |
| 7.`2H_2O` `→` `2H_2``↑`+`O_2` | e. combination or synthesis reaction |
TRUE \ FALSE
Copper can displace iron from iron sulphate.
Write a short note on the information derived from a balanced chemical equation.
Fill in the blank
A new substance is formed in a _______ change.
Fill in the blank:
The substances which undergo chemical change are called _______
Explain the following reaction with one suitable example of Combination reactions .
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Explain by writing a word equation.
Hard water gets softened on mixing with a solution of washing soda.
Write the chemical reaction where the following changes are observed.
Physical state is changed
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
Give a chemical test to distinguish between the following gases.
CO2 and SO2
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
Burning of paper is a ______ change.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
Analogy:
H2O: Water:: NaCl: ______.
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
