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प्रश्न
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
पर्याय
Hydrogen
Copper [II] oxide
Oxygen
Copper [II] hydroxide
Ammonia
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उत्तर
Copper [II] hydroxide
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron and rust are the same substances.
Changes in which new substances are formed are called ______ changes.
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
FILL IN THE BLANK
In a ............ change, new substances are formed.
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 |
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
What do you observe? When
Sodium chloride solution is added to silver nitrate solution.
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
Name: Two nitrates that do not produce nitrogen dioxide on heating.
What do you observe when H2S is passed through a lead nitrate solution.
Select the correct answer for the following options:
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
Give a word equation for the following reaction.
Two gases which combine to give a solid.
What is a chemical reaction?
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Copper nitrate.
Which of the following is not an “element + element → compound” type reaction?
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
The water we drink is a combination of hydrogen and oxygen.
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
