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Reducing Nature of Alkali Metals

The chief ore...

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The chief ore of Zn is the sulphide, Zns. The ore is concentrated by froth floatation process and then heated in air to convert ZnS to ZnO. 2ZnS+{30}_2\xrightarrow{80%}2ZnO+2S02 ZnO + H_2S04\xrightarrow{100%} ZnSO4 + H2O 2ZnSO_{4 }+2H_2O\xrightarrow{80%}2Zn +2H_2SO_4+O_2 The number of moles of ZnS required for producing 2 moles of Zn will be: (a) 3.125 (b) 2 (c) 2.125 (d) 4

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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

Z n

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

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

2 Z n S + 3 O_{2} \to 2 Z n O + 2 S O_{2} (Yield: 80 %)

Z n O + H_{2} S O_{4} \to Z n S O_{4} + H_{2} O (Yield: 100 %)

2 Z n S O_{4} + 2 H_{2} O \to 2 Z n + 2 H_{2} S O_{4} + O_{2} (Yield: 80%)

The number of moles of

Z n S

required for producing 2 mol of

Z n

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 %

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

100 %

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

80 %

Z n

obtained from a sample of ore containing

292.2

Z n S

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

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