State the uses of aluminium and copper.
(N/A) Aluminium:
$1$. Aluminium foils are used as wrappers for food materials.
$2$. The fine dust of the metal is used in paints and lacquers.
$3$. Aluminium,being highly reactive,is used in the extraction of chromium and manganese from their oxides.
$4$. Aluminium wires are used as electricity conductors.
$5$. Alloys containing aluminium are light and very useful.
Copper:
$1$. Copper is used in making wires for the electrical industry and for water and steam pipes.
$2$. It is also used in several alloys that are tougher than the metal itself,e.g.,brass (with zinc),bronze (with tin),and coinage alloy (with nickel).
$1$. Aluminium foils are used as wrappers for food materials.
$2$. The fine dust of the metal is used in paints and lacquers.
$3$. Aluminium,being highly reactive,is used in the extraction of chromium and manganese from their oxides.
$4$. Aluminium wires are used as electricity conductors.
$5$. Alloys containing aluminium are light and very useful.
Copper:
$1$. Copper is used in making wires for the electrical industry and for water and steam pipes.
$2$. It is also used in several alloys that are tougher than the metal itself,e.g.,brass (with zinc),bronze (with tin),and coinage alloy (with nickel).
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Write reactions to justify the amphoteric nature of aluminium.
Easy
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$2CaO \cdot 3B_2O_3 + Na_2CO_3 \xrightarrow{\text{aq. medium}} Z \text{ (Residue/ppt)} + \text{Filtrate}$
$\text{Filtrate} \xrightarrow{\text{Crystallisation & Filtration}} X \text{ (in filtrate)} + Y \text{ (Residue)}$
$X + CO_2 \to Y$
Identify compounds $X$ and $Y$ respectively.
$2CaO \cdot 3B_2O_3 + Na_2CO_3 \xrightarrow{\text{aq. medium}} Z \text{ (Residue/ppt)} + \text{Filtrate}$
$\text{Filtrate} \xrightarrow{\text{Crystallisation & Filtration}} X \text{ (in filtrate)} + Y \text{ (Residue)}$
$X + CO_2 \to Y$
Identify compounds $X$ and $Y$ respectively.
Difficult
View SolutionWhich of the following is added to borax to obtain boric acid?
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View Solution$H_3BO_3 + H_2O_2 \to H_2O + 'X' \xrightarrow{NaOH} 'Y'$
Which of the following statements is/are correct for $'Y'$?
Which of the following statements is/are correct for $'Y'$?
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View SolutionMatch the List-$I$ with List-$II$.
List-$I$ (Element) List-$II$ (Application) $A$. $Cs$ $I$. High temperature thermometer $B$. $Ga$ $II$. Water repellent sprays $C$. $B$ $III$. Photoelectric cells $D$. $Si$ $IV$. Bullet proof vest
Choose the most appropriate answer from the options given below:
| List-$I$ (Element) | List-$II$ (Application) |
|---|---|
| $A$. $Cs$ | $I$. High temperature thermometer |
| $B$. $Ga$ | $II$. Water repellent sprays |
| $C$. $B$ | $III$. Photoelectric cells |
| $D$. $Si$ | $IV$. Bullet proof vest |
Choose the most appropriate answer from the options given below:
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