An ore of aluminium.
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Solution and Explanation
Bauxite is the primary ore from which aluminium is extracted. It is a reddish-brown rock that contains a high percentage of aluminium minerals, such as gibbsite, boehmite, and diaspore. It is found in tropical and subtropical regions, particularly in countries like Australia, Brazil, and Guinea.
Step 2: The Extraction Process.
Bauxite is processed through the Bayer Process, which involves refining the ore to obtain alumina (aluminium oxide). This alumina is then reduced to aluminium metal through the Hall-Héroult process, which involves electrolyzing the alumina in molten cryolite.
Step 3: Importance of Bauxite.
Bauxite is the most important source of aluminium, and the demand for aluminium has grown due to its wide range of applications. Aluminium is lightweight, strong, and corrosion-resistant, making it ideal for use in industries such as aerospace, transportation, packaging, and construction.
Step 4: Environmental Impact.
While bauxite extraction and alumina refining can have environmental impacts, such as habitat destruction and water contamination, modern mining techniques aim to reduce these effects. The aluminium industry is also working towards recycling aluminium to minimize the need for new bauxite mining.
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Questions Asked in ICSE Class X board exam
Give the output of the following Java program segment:
String a[] = {"Atasi", "Aditi", "Anant", "Amit", "Ahana"};
System.out.println(a[1].charAt(1) + "*" + a[2].charAt(2));The output of the above statement is:
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- Character String
Assertion and Reasoning
Assertion (A): The substring() method modifies the original String.
Reason (R): The substring() method can extract part of a String from a specific index.
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Rewrite the following program segment using a
forloop:Given program segment:
int a = 5, b = 10;
while (b > 0)
{
b -= 2;
}
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System.out.printlnstatement after the loop terminates.- ICSE Class X board - 2026
- Control Statements
Define a class named
StepTrackerwith the following specifications:Member Variables:
String name— stores the user's name.int sw— stores the total number of steps walked ($sw$).double cb— stores the estimated calories burned ($cb$).double km— stores the estimated distance walked in kilometers ($km$).
Member Methods:
1.
void accept()
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void calculate()
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- Write a program to accept a two-dimensional integer array of order \( 4 \times 5 \) as input from the user. Check if it is a Sparse Matrix or not. A matrix is considered to be a sparse, if the total number of zero elements is greater than the total number of non-zero elements. Print appropriate messages.