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Q.

Copper reacts with hot and concentrated sulfuric acid to form copper sulphate, sulphur dioxide gas and water. Which of the following is the balancing order of each element?


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a

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>Cu</mi><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msub><mi>SO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>&#x2192;</mo><mo>&#xA0;</mo><msub><mi>CuSO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><msub><mi>SO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi></math>

b

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>Cu</mi><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msub><mi>SO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>&#x2192;</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi>CuSO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi>SO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi></math>

c

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>Cu</mi><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msub><mi>SO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>&#x2192;</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi>CuSO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><msub><mi>SO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi></math>

d

None 

answer is A.

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Detailed Solution

Concept- A balanced chemical equation is the equation which has the equal number of atoms present on both sides of the equation.
Thus, to balance the equation, we keep the count of the elements balanced on both sides of the reaction which maintains the same total mass of elements on both sides.
Now, in option 1, both sides have 1 Cu atom, 4 H atoms, 2 S atoms and 8 O atoms.
When copper reacts with sulphuric acid, the balanced equation is written as-
<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>Cu</mi><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msub><mi>SO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>&#x2192;</mo><mo>&#xA0;</mo><msub><mi>CuSO</mi><mn>4</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><msub><mi>SO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi></math>.
Equations given in option 2 and option 3 are not balanced.
Hence, the correct answer is 1.
 
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Copper reacts with hot and concentrated sulfuric acid to form copper sulphate, sulphur dioxide gas and water. Which of the following is the balancing order of each element?