List I List II A- Calcinationa- 2 Cu 2 S-3 O 2 - 2 Cu 2 O-2S O 2 B- Roastingb- Fe 2 O 3 - n H 2 O- Fe 2 O 3 -n H 2 O C- Fluxc- Cr 2 O 3 -2Al- Al 2 O 3 -2Cr D- Thermited- Si O 2 -FeO- FeSi O 3Match the following-

The correct option is B A b, B a, C d, D c(A) Calcination: #160;The concentrated ore is heated in absence of air to remove water or moisture from a ...

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Byju's Answer

Standard X

Chemistry

Calcination

List I List I...

Question

List I List II
A. Calcination a. $2 {C u}_{2} S + 3 O_{2} \to 2 {C u}_{2} O + 2 S O_{2}$
B. Roasting b. ${F e}_{2} O_{3} \cdot n H_{2} O \to {F e}_{2} O_{3} + n H_{2} O$
C. Flux c. ${C r}_{2} O_{3} + 2 A l \to {A l}_{2} O_{3} + 2 C r$
D. Thermite d. $S i O_{2} + F e O \to F e S i O_{3}$
Match the following.

A - a, B - b, C - c, D - d

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A - b, B - a, C - d, D - c

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A - d, B - a, C - b, D - d

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A - c, B - a, C - b, D - d

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Solution

The correct option is B A - b, B - a, C - d, D - c
(A) Calcination: The concentrated ore is heated in absence of air to remove water or moisture from a hydrated oxide and $C O_{2}$ from a carbonate ore at a temperature below their melting point. This process is called calcination and is generally carried out in a reverberatory furnace.
${F e}_{2} O_{3} \cdot n H_{2} O \to {F e}_{2} O_{3} + n H_{2} O$

(B) Roasting: The process in which the concentrated ore is heated in blast of air and ore gets converted into oxide and impurities like sulphur, arsenic are also oxidised to their oxides and is removed is called Roasting. It requires very high temperature and specialized furnace like Bessemer or reverberatory furnace.
$2 {C u}_{2} S + 3 O_{2} \to 2 {C u}_{2} O + 2 S O_{2}$

(C) Flux: The substance added to remove the gangue from the concentrated ore in its molten state is called flux and the substance formed with flux is called Slag. $S i O_{2}$ is an acidic slag.
$S i O_{2} + F e O \to F e S i O_{3}$

(D) Alumino thermite process: Certain Oxides of Mn, Cr do not reduce by carbon due to very high melting point. They are reduced by $A l$ .
${C r}_{2} O_{3} + 2 A l \to {A l}_{2} O_{3} + 2 C r$

Suggest Corrections

Similar questions

Q. Some of the reactions taking place during bessemerisation possibly are -

A : F e O + S i O_{2} \to F e S i O_{3}

B : 2 F e S + 3 O_{2} \to 2 F e O + 2 S O_{2}

C : 2 C u_{2} S + 3 O_{2} \to 2 C u_{2} O + 2 S O_{2}

D : 2 C u_{2} O + C u_{2} S \to 6 C u + S O_{2}

Select reactions actually taking place :

Q. Match the List I to List II :
(A)A-ii; B-i; C-iii; D-iv
(B)A-i; B-ii; C-iii; D-iv
(C)A-iii; B-ii; C-iv;D-i
(D) A-iv; B-iii; C-ii; D-i

Q. Match List I to List II :
(A)A-i; B-ii; C-iii; D-iv
(B) A-iv; B-ii; CUi;D-i
(C)A-iii; B-ii; C-i; D-iv
(D) A-iii; B-i, C-ii, D-iv

If (a + b +c + d) (a -b- c+ d)

=(a + b- c- d) (a -b+c- d);

prove that : a : b =c : d.

Q. Prove that

∣ ∣ ∣ ∣ ∣ ∣ \begin{matrix} a & b & c & d b & a & d & c c & d & a & b d & c & b & a \end{matrix} ∣ ∣ ∣ ∣ ∣ ∣ = (a + b + c + d) (a - b + c - d) (a - b - c + d) (a + b - c - d)

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List I	List II
A. Calcination	a. $2 {C u}_{2} S + 3 O_{2} \to 2 {C u}_{2} O + 2 S O_{2}$
B. Roasting	b. ${F e}_{2} O_{3} \cdot n H_{2} O \to {F e}_{2} O_{3} + n H_{2} O$
C. Flux	c. ${C r}_{2} O_{3} + 2 A l \to {A l}_{2} O_{3} + 2 C r$
D. Thermite	d. $S i O_{2} + F e O \to F e S i O_{3}$

List I List II A. Calcinationa. 2Cu2S+3O2→2Cu2O+2SO2 B. Roastingb. Fe2O3⋅nH2O→Fe2O3+nH2O C. Fluxc. Cr2O3+2Al→Al2O3+2Cr D. Thermited. SiO2+FeO→FeSiO3Match the following.