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प्रश्न
Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.
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उत्तर
- 2Na + H2O → 2NaOH + H2
- AgNO3 + NaCl → AgCl + NaNO3
- 2KClO3 → 2KCl + 3O2
- 6CO2 + 6H2O → C6H12O6 + 6O2
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
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
A precipitation reaction takes place only in a solution.
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
Explain the type of reactions on the basis of the direction of reaction.
Fill in the blank.
Melting of ice is a _______ change.
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
Explain by writing a word equation.
Hard water gets softened on mixing with a solution of washing soda.
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
Distinguish by heating the following in dry test tubs.
Zinc nitrate and copper nitrate.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Complete the table given below.
| Addition of dil. H2SO4 to KHCO3 | Name of residue obtained |
Water boiling into water vapour is an example of chemical change.
Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.
Explain how the painting of an iron gate prevents it from rusting.
Give an example where heat, light, and sound are produced during a chemical change.
______ is the chemical name of rust.
What is thermochemical reactions?
What are the chemical reactions that occur in everyday life?
