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Standard X

Chemistry

Roasting

In the conver...

Question

In the conversion of a zinc ore to zinc metal, the process of roasting involves:

Z n C O_{3} \to Z n O

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Z n O \to Z n S O_{4}

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Z n S \to Z n O

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Z n S \to Z n S O_{4}

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Solution

The correct option is A $Z n S \to Z n O$
In the conversion of a zinc ore to zinc metal, the process of roasting involves heating concentrated $z i n c s u l p h i d e$ ore in the presence of excess air at about 1200 K.
$2 Z n S + 3 O_{2} Δ - \to 2 Z n O + 2 S O_{2} ↑$

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Similar questions

The chief ore of

Z n

is the sulphide,

Z n S

. The ore is concentrated by froth floatation process and then heated in air to convert

Z n S

Z n O

2 Z n S + 3 O_{2} \to 2 Z n O + 2 S O_{2}

(

75 %

conversion)

Z n O + H_{2} S O_{4} \to Z n S O_{4} + H_{2} O

(

100 %

conversion )

2 Z n S O_{4} + 2 H_{2} O \to 2 Z n + 2 H_{2} S O_{4} + O_{2}

(

80 %

conversion)

The mass of

Z n

obtained from a sample of ore containing

292.2

kg of

Z n S

will be :

Q. The chief ore of

Z n

is its sulphide,

Z n S

. The ore is concentrated by froth floatation process and then heated in air to convert

Z n S

Z n O

. The following reactions take place in the extraction of

Z n

2ZnS+3O2→2ZnO+2SO2 (Yield: 62.5 \%)

ZnO+H2SO4→ZnSO4+H2O (Yield: 80 \%)

2ZnSO4+2H2O→2Zn+2H2SO4+O2 (Yield: 80\%)

The number of moles of

Z n S

required for producing

2

mol of

Z n

will be:

The major products of the following reaction

$Z n S (s) + O_{2} (g) h e a t - --- \to$

Are

Q. The chief ore of

Z n

is the sulphide,

Z n S

. The ore is concentrated by froth floatation process and then heated in air to convert

Z n S

Z n O

2 Z n S + 3 O_{2} 80 % - - \to 2 Z n O + 2 S O_{2}

Z n O + H_{2} S O_{4} 100 % - -- \to Z n S O_{4} + H_{2} O

2 Z n S O_{4} + 2 H_{2} O 80 % - - \to 2 Z n + 2 H_{2} S O_{4} + O_{2}

The number of moles of

Z n S

required to produce 2 moles of

Z n

will be:

Q. The chief ore of zinc is the sulphide,

Z n S

. The ore is concentrated by floatation process and then heated in air, which converts the

Z n S

Z n O

I .

2 Z n S + 3 O_{2} 90.6 % - -- \to 2 Z n O + 2 S O_{2}

The

Z n O

is then treated with dilute

H_{2} S O_{4}

I I .

2 Z n O + 2 H_{2} S O_{4} 100 % - -- \to 2 Z n S O_{4} + 2 H_{2} O

Z n

metal is produced on electrolysis.

I I I .

2 Z n S O_{4} + 2 H_{2} O 98.2 % - -- \to 2 Z n + 2 H_{2} S O_{4} + O_{2}

Efficiencies of the processes have been indicated above the arrow mark. Mass of

Z n

will be obtained from an ore containing

225

kg of

Z n S

in kg is (nearest integer value):

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In the conversion of a zinc ore to zinc metal, the process of roasting involves:

The correct option is A ZnS→ZnOIn the conversion of a zinc ore to zinc metal, the process of roasting involves heating concentrated zincsulphide ore in the presence of excess air at about 1200 K.2ZnS+3O2Δ−→2ZnO+2SO2↑

The correct option is A $Z n S \to Z n O$
In the conversion of a zinc ore to zinc metal, the process of roasting involves heating concentrated $z i n c s u l p h i d e$ ore in the presence of excess air at about 1200 K.
$2 Z n S + 3 O_{2} Δ - \to 2 Z n O + 2 S O_{2} ↑$