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Write a short note on Alloying.
Concept: Corrosion of Metals
Observe the following picture and answer the following questions:
- What is rust?
- Write the chemical formula of rust.
- Write the reaction of oxidation of iron at the anode.
- Write the reaction of oxidation of iron at the cathode.
- What is corrosion?
Concept: Corrosion of Metals
Write scientific reason.
On exposure to air, silver articles turn blackish after some time.
Concept: Corrosion of Metals
Explain the reaction given in the figure.
Concept: Types of Chemical Reactions > Decomposition Reaction
Gold plated ornaments is the example of ______.
Concept: Corrosion of Metals
Identify the type of chemical reaction given below:
\[\ce{CuSO4 + Fe -> FeSO4 + Cu}\]
Concept: Types of Chemical Reactions > Single Displacement Reaction
Identify the type of chemical reaction given below:
\[\ce{2Mg + O2 -> 2MgO}\]
Concept: Chemical Properties of Carbon Compounds > Oxidation
Identify the type of chemical reaction given below:
\[\ce{2KClO3 -> 2KCl + 3O2 ^}\]
Concept: Endothermic and Exothermic Processes
In a double displacement reaction ______.
Concept: Types of Chemical Reactions > Double Displacement Reaction
Give scientific reasons.
Silver amalgam is used for filling dental cavities.
Concept: Corrosion of Metals
Complete the following chemical reaction:
\[\ce{CuSO4 (aq) + Pb (s) -> \underline{}\underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the chemical reaction type.
Concept: Types of Chemical Reactions > Single Displacement Reaction
Complete the given chemical equation:
\[\ce{Zn(s) + CuSO4(aq) -> \underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the type of reaction.
Concept: Types of Chemical Reactions > Single Displacement Reaction
| A process of forming a thick oxide of aluminium when aluminium is exposed to air. This coat makes it resistant to corrosion. Resistance can be improved by making a layer of oxide thinker. In this technique, the aluminium article is the anode, and the electrolyte is sulphuric acid. The anode reaction results in the formation of a black-coloured film of aluminium oxide on the anode. By putting appropriate dyes in the electrolytic solution, both coloured surface with the decorative finish is achieved. Kitchen articles like anodised such as pressure cookers, pans and frames of sliding windows are applications of this technique. |
- Name the anode and electrolyte used in this technique.
- How can we make aluminium articles made resistant to corrosion?
- Name the technique used to coat the aluminium articles.
Concept: Corrosion of Metals
Which of the following statement is incorrect with reference to the reaction of silver nitrate with sodium chloride?
Concept: Balancing Chemical Equation
It is recommended to use air tight containers for storing oil for a long time.
Concept: Chemical Properties of Carbon Compounds > Oxidation
Complete the following table:
| Chemical Reactions | Name reaction type |
| \[\ce{C(s) + O2(g) -> CO2(g)}\] | (a) ________ |
| \[\ce{Zn(s) + CuSO4(aq) ->}\] (b) _________ | Displacement reaction |
| \[\ce{2Cu(s) + O2(g) ->[heat] 2CuO(s)}\] | (c) _________ |
| \[\ce{C(s) + 2H2(g) -> CH4(g)}\] | (d) _________ |
| \[\ce{CaO(s) + H2O(l) -> Ca(OH)2(aq) + heat}\] | (e) _________ |
| \[\ce{CaCO3(s) + Heat ->}\] (f) _________ | Endothermic Reaction |
Concept: Endothermic and Exothermic Processes
Complete the co-relation:
CuI2 : Brown : : AgCl : ______
Concept: Balancing Chemical Equation
Complete the following reaction:
\[\ce{C_12H_22O11->[Heat]}\] ______ + ______.
Concept: Types of Chemical Reactions > Decomposition Reaction
What are the factors affecting the rate of chemical reaction?
Concept: Factors Affecting the Rate of a Chemical Reaction
Explain any one factor affecting the rate of chemical reaction.
Concept: Factors Affecting the Rate of a Chemical Reaction
