Match the conversion in C o l u m n I with the types of reactions given in C o l u m n I I- begin array - c - c - c - c -WhineA- PbS longrightarrow PbO - p- - Roastingll lhlineD- Cu2S Vongrightarrow Cu - s- Self-reductionll lend array A- A- - s - B - - q - C - - p - r - D - - p - sB- A- - p - s - B - - q - r - C - - p - r - D - - p - sC- A- - p - s - B - - q - C - - p - q - r - D - p - sD- A- - p - B - - q - C - - p - r - D - - p - s -

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Roasting

Match the con...

Question

Match the conversion in $C o l u m n I$ with the type(s) of reaction(s) given in $C o l u m n I I$ .
$\begin{matrix} C o l u m n I & C o l u m n I I A . & P b S ⟶ P b O & p . & R o a s t i n g B . & C a C O_{3} ⟶ C a O & q . & C a l c i n a t i o n C . & Z n S ⟶ Z n & r . & C a r b o n r e d u c t i o n D . & C u_{2} S ⟶ C u & s . & S e l f - r e d u c t i o n \end{matrix}$

A . \to p; B . \to q; C . \to p, r; D . \to p, s .

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A . \to p, s; B . \to q; C . \to p, q, r; D . \to p, s .

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A . \to s; B . \to q; C . \to p, r; D . \to p, s .

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A . \to p, s; B . \to q, r; C . \to p, r; D . \to p, s .

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Solution

The correct option is A $A . \to p; B . \to q; C . \to p, r; D . \to p, s .$
$P b S ⟶ P b O$
This is an example of a sulphide ore getting converted $o n l y$ to an oxide ore.
Hence, it is actually roasting!

$C a C O_{3} ⟶ C a O$
Likewise, this is a carbonate ore getting calcined to an oxide ore! Calcination!

$Z n S ⟶ Z n$
The above is actually a sulphide ore getting converted into metal!
From the given options, well need "roasting" to convert it to an oxide, which could then
be reduced to the metal using carbon reduction. Zn is way too active a metal for self-reduction!

For extraction of copper, partial roasting of the sulphide ore followed by self-reduction is the way to go!
$C u_{2} S ⟶ C u$

Suggest Corrections

Similar questions

Q. Match the conversion in

C o l u m n I

with the type(s) of reaction(s) given in

C o l u m n I I

\begin{matrix} C o l u m n I & C o l u m n I I A . & P b S ⟶ P b O & p . & R o a s t i n g B . & C a C O_{3} ⟶ C a O & q . & C a l c i n a t i o n C . & Z n S ⟶ Z n & r . & C a r b o n r e d u c t i o n D . & C u_{2} S ⟶ C u & s . & S e l f - r e d u c t i o n \end{matrix}

Q. Match the following by appropriately matching the lists based on the information given in

Column I

and

Column II

\begin{matrix} C o l u m n I & C o l u m n I I (T y p e o f △ A B C) a. cot \frac{A}{2} = \frac{b + c}{a} & p. always right angled b. a tan A + b tan B = (a + b) tan \frac{A + B}{2} & q. always isosceles c. a cos A = b cos B & r. may be right angled d. cos A = \frac{sin B}{2 sin C} & s. may be right angled isosceles \end{matrix}

$\begin{matrix} Column - 1 & Column - II (a) & N_{2} O & (p) & Brown coloured gas (b) & N O_{2} & (q) & Blue coloured liquid at 243K (c) & N_{2} O_{3} & (r) & White crystalline solid (d) & N_{2} O_{5} & (s) & Colourless gas, produces hysterical laughter when inhaled \end{matrix}$

Q. Match the corresponding entries of column

1

with column

2

where

m

is the magnification produced by the mirror.

\begin{matrix} Column 1 & Column 2 (A) m = - 2 & (p) Convex mirror (B) m = - \frac{1}{2} & (q) Concave mirror (C) m = + 2 & (r) Real image (D) m = + \frac{1}{2} & (s) Virtual image \end{matrix}

\begin{matrix} Column I & Column II a. The sides of a triangle vary slightly in such a way that its circum-radius & p. 1 remains constant. If \frac{d a}{cos A} + \frac{d b}{cos B} + \frac{d c}{cos C} + 1 = | m |, then the value of m is b. The length of sub-tangent to the curve x^{2} y^{2} = 16 at the point (-2, 2) is |k|. & q. - 1 Then the value of k is c. The curve y = 2 e^{2 x} intersects the y-axis at an angle {cot}^{- 1} ∣ ∣ ∣ \frac{8 n - 4}{3} ∣ ∣ ∣ . & r. 2 Then the value of n is d. The area of a triangle formed by normal at the point (1, 0) on the curve & s. - 2 x = e^{sin y} with axes is \frac{| 2 t + 1 |}{6} sq. units. Then the value of t is \end{matrix}

Which of the following is correct ?

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Match the conversion in Column I with the type(s) of reaction(s) given in Column II. Column IColumn IIA.PbS⟶PbOp.RoastingB.CaCO3⟶CaOq.CalcinationC.ZnS⟶Znr.Carbon reductionD.Cu2S⟶Cus.Self−reduction