CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321105
How many of the following are the minerals of aluminium? Magnesite, cryolite, kaolinite, malachite, epsum salt, bauxite, cuprite
1 7
2 1
3 3
4 5
Explanation:
Cryolite \({\mathrm{\left(\mathrm{Na}_{3} \mathrm{AlF}_{6}\right)}}\), kaolinite \({\mathrm{\left[\mathrm{Al}_{2}(\mathrm{OH})_{4} \mathrm{Si}_{2} \mathrm{O}_{5}\right]}}\), and bauxite \({\mathrm{\left(\mathrm{Al}_{2} \mathrm{O}_{3} .2 \mathrm{H}_{2} \mathrm{O}\right)}}\) are the minerals of aluminium.So answer is 3. So, the correct option is (3).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321106
The most important ore of tin is
1 cassiterite
2 cryolite
3 cerussite
4 None of these
Explanation:
The chief ore of tin is cassiterite or tin stone, \(\mathrm{SnO}_{2}\).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321107
In chromite ore, the oxidation number of iron, and chromium are respectively
1 \(\mathrm{+3,+2}\)
2 \(\mathrm{+3,+6}\)
3 \(\mathrm{+2,+6}\)
4 \(\mathrm{+2,+3}\)
Explanation:
Chromite ore is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\).Its actual composition is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\). In FeO,oxidation state of Fe is \({\text{x + ( - 2) = 0}}\, \Rightarrow {\text{x = + 2}}\) Similarly, in \({\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{3}}}\), the oxidation state of Cr is \({\text{2{ X}x + ( - 2){ X}3 = 0}} \Rightarrow {\text{x = + 3}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321105
How many of the following are the minerals of aluminium? Magnesite, cryolite, kaolinite, malachite, epsum salt, bauxite, cuprite
1 7
2 1
3 3
4 5
Explanation:
Cryolite \({\mathrm{\left(\mathrm{Na}_{3} \mathrm{AlF}_{6}\right)}}\), kaolinite \({\mathrm{\left[\mathrm{Al}_{2}(\mathrm{OH})_{4} \mathrm{Si}_{2} \mathrm{O}_{5}\right]}}\), and bauxite \({\mathrm{\left(\mathrm{Al}_{2} \mathrm{O}_{3} .2 \mathrm{H}_{2} \mathrm{O}\right)}}\) are the minerals of aluminium.So answer is 3. So, the correct option is (3).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321106
The most important ore of tin is
1 cassiterite
2 cryolite
3 cerussite
4 None of these
Explanation:
The chief ore of tin is cassiterite or tin stone, \(\mathrm{SnO}_{2}\).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321107
In chromite ore, the oxidation number of iron, and chromium are respectively
1 \(\mathrm{+3,+2}\)
2 \(\mathrm{+3,+6}\)
3 \(\mathrm{+2,+6}\)
4 \(\mathrm{+2,+3}\)
Explanation:
Chromite ore is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\).Its actual composition is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\). In FeO,oxidation state of Fe is \({\text{x + ( - 2) = 0}}\, \Rightarrow {\text{x = + 2}}\) Similarly, in \({\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{3}}}\), the oxidation state of Cr is \({\text{2{ X}x + ( - 2){ X}3 = 0}} \Rightarrow {\text{x = + 3}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321105
How many of the following are the minerals of aluminium? Magnesite, cryolite, kaolinite, malachite, epsum salt, bauxite, cuprite
1 7
2 1
3 3
4 5
Explanation:
Cryolite \({\mathrm{\left(\mathrm{Na}_{3} \mathrm{AlF}_{6}\right)}}\), kaolinite \({\mathrm{\left[\mathrm{Al}_{2}(\mathrm{OH})_{4} \mathrm{Si}_{2} \mathrm{O}_{5}\right]}}\), and bauxite \({\mathrm{\left(\mathrm{Al}_{2} \mathrm{O}_{3} .2 \mathrm{H}_{2} \mathrm{O}\right)}}\) are the minerals of aluminium.So answer is 3. So, the correct option is (3).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321106
The most important ore of tin is
1 cassiterite
2 cryolite
3 cerussite
4 None of these
Explanation:
The chief ore of tin is cassiterite or tin stone, \(\mathrm{SnO}_{2}\).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321107
In chromite ore, the oxidation number of iron, and chromium are respectively
1 \(\mathrm{+3,+2}\)
2 \(\mathrm{+3,+6}\)
3 \(\mathrm{+2,+6}\)
4 \(\mathrm{+2,+3}\)
Explanation:
Chromite ore is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\).Its actual composition is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\). In FeO,oxidation state of Fe is \({\text{x + ( - 2) = 0}}\, \Rightarrow {\text{x = + 2}}\) Similarly, in \({\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{3}}}\), the oxidation state of Cr is \({\text{2{ X}x + ( - 2){ X}3 = 0}} \Rightarrow {\text{x = + 3}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321105
How many of the following are the minerals of aluminium? Magnesite, cryolite, kaolinite, malachite, epsum salt, bauxite, cuprite
1 7
2 1
3 3
4 5
Explanation:
Cryolite \({\mathrm{\left(\mathrm{Na}_{3} \mathrm{AlF}_{6}\right)}}\), kaolinite \({\mathrm{\left[\mathrm{Al}_{2}(\mathrm{OH})_{4} \mathrm{Si}_{2} \mathrm{O}_{5}\right]}}\), and bauxite \({\mathrm{\left(\mathrm{Al}_{2} \mathrm{O}_{3} .2 \mathrm{H}_{2} \mathrm{O}\right)}}\) are the minerals of aluminium.So answer is 3. So, the correct option is (3).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321106
The most important ore of tin is
1 cassiterite
2 cryolite
3 cerussite
4 None of these
Explanation:
The chief ore of tin is cassiterite or tin stone, \(\mathrm{SnO}_{2}\).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321107
In chromite ore, the oxidation number of iron, and chromium are respectively
1 \(\mathrm{+3,+2}\)
2 \(\mathrm{+3,+6}\)
3 \(\mathrm{+2,+6}\)
4 \(\mathrm{+2,+3}\)
Explanation:
Chromite ore is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\).Its actual composition is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\). In FeO,oxidation state of Fe is \({\text{x + ( - 2) = 0}}\, \Rightarrow {\text{x = + 2}}\) Similarly, in \({\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{3}}}\), the oxidation state of Cr is \({\text{2{ X}x + ( - 2){ X}3 = 0}} \Rightarrow {\text{x = + 3}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321105
How many of the following are the minerals of aluminium? Magnesite, cryolite, kaolinite, malachite, epsum salt, bauxite, cuprite
1 7
2 1
3 3
4 5
Explanation:
Cryolite \({\mathrm{\left(\mathrm{Na}_{3} \mathrm{AlF}_{6}\right)}}\), kaolinite \({\mathrm{\left[\mathrm{Al}_{2}(\mathrm{OH})_{4} \mathrm{Si}_{2} \mathrm{O}_{5}\right]}}\), and bauxite \({\mathrm{\left(\mathrm{Al}_{2} \mathrm{O}_{3} .2 \mathrm{H}_{2} \mathrm{O}\right)}}\) are the minerals of aluminium.So answer is 3. So, the correct option is (3).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321106
The most important ore of tin is
1 cassiterite
2 cryolite
3 cerussite
4 None of these
Explanation:
The chief ore of tin is cassiterite or tin stone, \(\mathrm{SnO}_{2}\).
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321107
In chromite ore, the oxidation number of iron, and chromium are respectively
1 \(\mathrm{+3,+2}\)
2 \(\mathrm{+3,+6}\)
3 \(\mathrm{+2,+6}\)
4 \(\mathrm{+2,+3}\)
Explanation:
Chromite ore is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\).Its actual composition is \({\text{FeC}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{4}}}\). In FeO,oxidation state of Fe is \({\text{x + ( - 2) = 0}}\, \Rightarrow {\text{x = + 2}}\) Similarly, in \({\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{3}}}\), the oxidation state of Cr is \({\text{2{ X}x + ( - 2){ X}3 = 0}} \Rightarrow {\text{x = + 3}}\)