NEET Test Series from KOTA - 10 Papers In MS WORD
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11. THE P-BLOCK ELEMENTS
189670
Which one is used as a bye-product in Serpeck's process
1 \(N{H_3}\)
2 \(C{O_2}\)
3 \({N_2}\)
4 \(P{H_3}\)
Explanation:
A reaction of Serpeck's Process: \(AlN +3 H _2 O \rightarrow Al ( OH )_3+ NH _3\) So, the byproduct of Serpeck's process is \(NH _3\)
11. THE P-BLOCK ELEMENTS
189671
In the metallurgy of aluminium, cryolite is mixed in the molten state because it
1 Increases the melting point of alumina
2 Oxidises alumina
3 Reduces alumina
4 Decreases the melting point of alumina
Explanation:
(d) Cryolite \(N{a_3}Al{F_6}\) (1) Decreases the melting point of alumina (2) Increases conductivity of the solution
11. THE P-BLOCK ELEMENTS
189672
In the electrolytic extraction of aluminium, cryolite is used
1 To obtain more aluminium
2 To decrease temperature to dissolve bauxite
3 To protect the anode
4 As reducing agent
Explanation:
(b) Cryolite \(N{a_3}Al{F_6}\) is added (1) To decrease the melting temp from \(2323\,K\) to \(1140\,K\) (2) To increase the electrical conductivity of solution
11. THE P-BLOCK ELEMENTS
189673
In the extraction of aluminium, bauxite is dissolved in cryolite because
189670
Which one is used as a bye-product in Serpeck's process
1 \(N{H_3}\)
2 \(C{O_2}\)
3 \({N_2}\)
4 \(P{H_3}\)
Explanation:
A reaction of Serpeck's Process: \(AlN +3 H _2 O \rightarrow Al ( OH )_3+ NH _3\) So, the byproduct of Serpeck's process is \(NH _3\)
11. THE P-BLOCK ELEMENTS
189671
In the metallurgy of aluminium, cryolite is mixed in the molten state because it
1 Increases the melting point of alumina
2 Oxidises alumina
3 Reduces alumina
4 Decreases the melting point of alumina
Explanation:
(d) Cryolite \(N{a_3}Al{F_6}\) (1) Decreases the melting point of alumina (2) Increases conductivity of the solution
11. THE P-BLOCK ELEMENTS
189672
In the electrolytic extraction of aluminium, cryolite is used
1 To obtain more aluminium
2 To decrease temperature to dissolve bauxite
3 To protect the anode
4 As reducing agent
Explanation:
(b) Cryolite \(N{a_3}Al{F_6}\) is added (1) To decrease the melting temp from \(2323\,K\) to \(1140\,K\) (2) To increase the electrical conductivity of solution
11. THE P-BLOCK ELEMENTS
189673
In the extraction of aluminium, bauxite is dissolved in cryolite because
189670
Which one is used as a bye-product in Serpeck's process
1 \(N{H_3}\)
2 \(C{O_2}\)
3 \({N_2}\)
4 \(P{H_3}\)
Explanation:
A reaction of Serpeck's Process: \(AlN +3 H _2 O \rightarrow Al ( OH )_3+ NH _3\) So, the byproduct of Serpeck's process is \(NH _3\)
11. THE P-BLOCK ELEMENTS
189671
In the metallurgy of aluminium, cryolite is mixed in the molten state because it
1 Increases the melting point of alumina
2 Oxidises alumina
3 Reduces alumina
4 Decreases the melting point of alumina
Explanation:
(d) Cryolite \(N{a_3}Al{F_6}\) (1) Decreases the melting point of alumina (2) Increases conductivity of the solution
11. THE P-BLOCK ELEMENTS
189672
In the electrolytic extraction of aluminium, cryolite is used
1 To obtain more aluminium
2 To decrease temperature to dissolve bauxite
3 To protect the anode
4 As reducing agent
Explanation:
(b) Cryolite \(N{a_3}Al{F_6}\) is added (1) To decrease the melting temp from \(2323\,K\) to \(1140\,K\) (2) To increase the electrical conductivity of solution
11. THE P-BLOCK ELEMENTS
189673
In the extraction of aluminium, bauxite is dissolved in cryolite because
189670
Which one is used as a bye-product in Serpeck's process
1 \(N{H_3}\)
2 \(C{O_2}\)
3 \({N_2}\)
4 \(P{H_3}\)
Explanation:
A reaction of Serpeck's Process: \(AlN +3 H _2 O \rightarrow Al ( OH )_3+ NH _3\) So, the byproduct of Serpeck's process is \(NH _3\)
11. THE P-BLOCK ELEMENTS
189671
In the metallurgy of aluminium, cryolite is mixed in the molten state because it
1 Increases the melting point of alumina
2 Oxidises alumina
3 Reduces alumina
4 Decreases the melting point of alumina
Explanation:
(d) Cryolite \(N{a_3}Al{F_6}\) (1) Decreases the melting point of alumina (2) Increases conductivity of the solution
11. THE P-BLOCK ELEMENTS
189672
In the electrolytic extraction of aluminium, cryolite is used
1 To obtain more aluminium
2 To decrease temperature to dissolve bauxite
3 To protect the anode
4 As reducing agent
Explanation:
(b) Cryolite \(N{a_3}Al{F_6}\) is added (1) To decrease the melting temp from \(2323\,K\) to \(1140\,K\) (2) To increase the electrical conductivity of solution
11. THE P-BLOCK ELEMENTS
189673
In the extraction of aluminium, bauxite is dissolved in cryolite because
