189684
In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
1 Minimize the heat loss due to radiation
2 Protect aluminium produced from oxygen
3 Dissolve bauxite and render it conductor of electricity
4 Lower the melting point of bauxite
Explanation:
(c) In electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to charge because it reduces the melting point of Bauxite (from \({1200\,^o}C\) to \({800^o} - {900\,^o}C\)) and also it increases electrical conductivity of mixture.
11. THE P-BLOCK ELEMENTS
189685
Hoop's process is used for the purification of the metal
1 \(Al\)
2 \(Zn\)
3 \(Ag\)
4 \(Cu\)
Explanation:
(a) Hoop’s process $⇒$ Purification of \(Al\) Hall and Heroult process $⇒$ Reduction of \(A{l_2}{O_3}\) Baeyer’s and Serpeck’s process $⇒$ Concentration of Bauxite ore
11. THE P-BLOCK ELEMENTS
189686
Purification of aluminium done by electrolytic refining is known as
1 Serpeck's process
2 Hall's process
3 Baeyer's process
4 Hoop's process
Explanation:
Purification of aluminium by electrolytic refining is called Hoope's process. By this method \(99.9\, \%\) pure aluminium metal is obtained. The cell used in this method consists of three layers. In the cell pure \(Al\) acts as cathode while anode is of impure \(Al.\)
11. THE P-BLOCK ELEMENTS
189687
In the Hoope's process for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also. This is because
1 The upper layer is kept attracted by the cathode and the lower layer is kept attracted by the anode
2 There is special arrangement in the cell to keep the layers separate
3 The \(3\) layers have different densities
4 The \(3\) layers are maintained at different temperatures
189684
In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
1 Minimize the heat loss due to radiation
2 Protect aluminium produced from oxygen
3 Dissolve bauxite and render it conductor of electricity
4 Lower the melting point of bauxite
Explanation:
(c) In electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to charge because it reduces the melting point of Bauxite (from \({1200\,^o}C\) to \({800^o} - {900\,^o}C\)) and also it increases electrical conductivity of mixture.
11. THE P-BLOCK ELEMENTS
189685
Hoop's process is used for the purification of the metal
1 \(Al\)
2 \(Zn\)
3 \(Ag\)
4 \(Cu\)
Explanation:
(a) Hoop’s process $⇒$ Purification of \(Al\) Hall and Heroult process $⇒$ Reduction of \(A{l_2}{O_3}\) Baeyer’s and Serpeck’s process $⇒$ Concentration of Bauxite ore
11. THE P-BLOCK ELEMENTS
189686
Purification of aluminium done by electrolytic refining is known as
1 Serpeck's process
2 Hall's process
3 Baeyer's process
4 Hoop's process
Explanation:
Purification of aluminium by electrolytic refining is called Hoope's process. By this method \(99.9\, \%\) pure aluminium metal is obtained. The cell used in this method consists of three layers. In the cell pure \(Al\) acts as cathode while anode is of impure \(Al.\)
11. THE P-BLOCK ELEMENTS
189687
In the Hoope's process for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also. This is because
1 The upper layer is kept attracted by the cathode and the lower layer is kept attracted by the anode
2 There is special arrangement in the cell to keep the layers separate
3 The \(3\) layers have different densities
4 The \(3\) layers are maintained at different temperatures
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11. THE P-BLOCK ELEMENTS
189684
In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
1 Minimize the heat loss due to radiation
2 Protect aluminium produced from oxygen
3 Dissolve bauxite and render it conductor of electricity
4 Lower the melting point of bauxite
Explanation:
(c) In electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to charge because it reduces the melting point of Bauxite (from \({1200\,^o}C\) to \({800^o} - {900\,^o}C\)) and also it increases electrical conductivity of mixture.
11. THE P-BLOCK ELEMENTS
189685
Hoop's process is used for the purification of the metal
1 \(Al\)
2 \(Zn\)
3 \(Ag\)
4 \(Cu\)
Explanation:
(a) Hoop’s process $⇒$ Purification of \(Al\) Hall and Heroult process $⇒$ Reduction of \(A{l_2}{O_3}\) Baeyer’s and Serpeck’s process $⇒$ Concentration of Bauxite ore
11. THE P-BLOCK ELEMENTS
189686
Purification of aluminium done by electrolytic refining is known as
1 Serpeck's process
2 Hall's process
3 Baeyer's process
4 Hoop's process
Explanation:
Purification of aluminium by electrolytic refining is called Hoope's process. By this method \(99.9\, \%\) pure aluminium metal is obtained. The cell used in this method consists of three layers. In the cell pure \(Al\) acts as cathode while anode is of impure \(Al.\)
11. THE P-BLOCK ELEMENTS
189687
In the Hoope's process for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also. This is because
1 The upper layer is kept attracted by the cathode and the lower layer is kept attracted by the anode
2 There is special arrangement in the cell to keep the layers separate
3 The \(3\) layers have different densities
4 The \(3\) layers are maintained at different temperatures
189684
In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
1 Minimize the heat loss due to radiation
2 Protect aluminium produced from oxygen
3 Dissolve bauxite and render it conductor of electricity
4 Lower the melting point of bauxite
Explanation:
(c) In electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to charge because it reduces the melting point of Bauxite (from \({1200\,^o}C\) to \({800^o} - {900\,^o}C\)) and also it increases electrical conductivity of mixture.
11. THE P-BLOCK ELEMENTS
189685
Hoop's process is used for the purification of the metal
1 \(Al\)
2 \(Zn\)
3 \(Ag\)
4 \(Cu\)
Explanation:
(a) Hoop’s process $⇒$ Purification of \(Al\) Hall and Heroult process $⇒$ Reduction of \(A{l_2}{O_3}\) Baeyer’s and Serpeck’s process $⇒$ Concentration of Bauxite ore
11. THE P-BLOCK ELEMENTS
189686
Purification of aluminium done by electrolytic refining is known as
1 Serpeck's process
2 Hall's process
3 Baeyer's process
4 Hoop's process
Explanation:
Purification of aluminium by electrolytic refining is called Hoope's process. By this method \(99.9\, \%\) pure aluminium metal is obtained. The cell used in this method consists of three layers. In the cell pure \(Al\) acts as cathode while anode is of impure \(Al.\)
11. THE P-BLOCK ELEMENTS
189687
In the Hoope's process for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also. This is because
1 The upper layer is kept attracted by the cathode and the lower layer is kept attracted by the anode
2 There is special arrangement in the cell to keep the layers separate
3 The \(3\) layers have different densities
4 The \(3\) layers are maintained at different temperatures