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प्रश्न
Explain the following reaction with one suitable example of Decomposition reaction
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उत्तर
Decomposition reaction : In this reaction a substance breaks up on heating to form two or more simpler substances, e.g. Electrolysis of water.
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equation:
\[\ce{Pb(NO3)2 ->[Heat]}\]
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
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
Weak electrolytes dissociate partially in their aqueous or fused state.
True or false
New substances are formed in a chemical change.
Complete and balance the following reaction:
NaCl(aq) + AgNO3(aq) →
What do you observe when H2S is passed through a lead nitrate solution.
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
Give a word equation for the following reaction.
Two solids which combine on heating, to give a liquid.
Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
________ is a chemical substance which alters the speed of a chemical reaction.
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?
The percentage composition of Nitrogen in Ureas is ______.
Heat may evolve or be absorbed during a ______ change.
Write a note on the following:
Curdling of milk
______ is the chemical name of rust.
