189647
An element \(A\) dissolves both in acid and alkali. It is an example of
1 Allotropic nature of \(A\)
2 Dimorphic nature of \(A\)
3 Amorphous nature of \(A\)
4 Amphoteric nature of \(A\)
Explanation:
(d) Amphoteric substance can react with both acid and base.
11. THE P-BLOCK ELEMENTS
189648
Hydrogen gas will not reduce
1 Heated cupric oxide
2 Heated ferric oxide
3 Heated stannic oxide
4 Heated aluminium oxide
Explanation:
Aluminium oxide cannot be reduced by hydrogen even under very hot conditions because \(Al\) is more reactive than \(H\). While other oxides can be reduced by hydrogen as they are below hydrogen in the metal reactivity series.
11. THE P-BLOCK ELEMENTS
189649
Conc. \(HN{O_3}\)
1 Reacts with aluminium vigrously
2 Reacts with aluminium to form aluminium nitrate
3 Does not react with aluminium
4 Reacts with platinum
Explanation:
Aluminum metal is not attacked by nitric acid of any concentration because of the thin and unreactive protective layer of aluminum oxide formed on the metallic surface due to the reaction of aluminium metal with oxygen of air.
11. THE P-BLOCK ELEMENTS
189650
Anhydrous \(AlC{l_3}\) is obtained from
1 \(HCl\) and aluminium metal
2 Aluminium and chlorine gas
3 Hydrogen chloride gas and aluminium metal
4 None of the above
Explanation:
(c) \(2Al + 6HCl \to 2AlC{l_3} + 3{H_2}\)
11. THE P-BLOCK ELEMENTS
189651
Which is true for an element \(R\) present in III group of the periodic table
1 It is gas at room temperature
2 It has oxidation state of \( + \,4\)
3 It forms \({R_2}{O_3}\)
4 It forms \(R{X_2}\)
Explanation:
(c) \(Al\) \(\to\) \(III\) group \(\to\) Forms \(A{l_2}{O_3}\)
189647
An element \(A\) dissolves both in acid and alkali. It is an example of
1 Allotropic nature of \(A\)
2 Dimorphic nature of \(A\)
3 Amorphous nature of \(A\)
4 Amphoteric nature of \(A\)
Explanation:
(d) Amphoteric substance can react with both acid and base.
11. THE P-BLOCK ELEMENTS
189648
Hydrogen gas will not reduce
1 Heated cupric oxide
2 Heated ferric oxide
3 Heated stannic oxide
4 Heated aluminium oxide
Explanation:
Aluminium oxide cannot be reduced by hydrogen even under very hot conditions because \(Al\) is more reactive than \(H\). While other oxides can be reduced by hydrogen as they are below hydrogen in the metal reactivity series.
11. THE P-BLOCK ELEMENTS
189649
Conc. \(HN{O_3}\)
1 Reacts with aluminium vigrously
2 Reacts with aluminium to form aluminium nitrate
3 Does not react with aluminium
4 Reacts with platinum
Explanation:
Aluminum metal is not attacked by nitric acid of any concentration because of the thin and unreactive protective layer of aluminum oxide formed on the metallic surface due to the reaction of aluminium metal with oxygen of air.
11. THE P-BLOCK ELEMENTS
189650
Anhydrous \(AlC{l_3}\) is obtained from
1 \(HCl\) and aluminium metal
2 Aluminium and chlorine gas
3 Hydrogen chloride gas and aluminium metal
4 None of the above
Explanation:
(c) \(2Al + 6HCl \to 2AlC{l_3} + 3{H_2}\)
11. THE P-BLOCK ELEMENTS
189651
Which is true for an element \(R\) present in III group of the periodic table
1 It is gas at room temperature
2 It has oxidation state of \( + \,4\)
3 It forms \({R_2}{O_3}\)
4 It forms \(R{X_2}\)
Explanation:
(c) \(Al\) \(\to\) \(III\) group \(\to\) Forms \(A{l_2}{O_3}\)
189647
An element \(A\) dissolves both in acid and alkali. It is an example of
1 Allotropic nature of \(A\)
2 Dimorphic nature of \(A\)
3 Amorphous nature of \(A\)
4 Amphoteric nature of \(A\)
Explanation:
(d) Amphoteric substance can react with both acid and base.
11. THE P-BLOCK ELEMENTS
189648
Hydrogen gas will not reduce
1 Heated cupric oxide
2 Heated ferric oxide
3 Heated stannic oxide
4 Heated aluminium oxide
Explanation:
Aluminium oxide cannot be reduced by hydrogen even under very hot conditions because \(Al\) is more reactive than \(H\). While other oxides can be reduced by hydrogen as they are below hydrogen in the metal reactivity series.
11. THE P-BLOCK ELEMENTS
189649
Conc. \(HN{O_3}\)
1 Reacts with aluminium vigrously
2 Reacts with aluminium to form aluminium nitrate
3 Does not react with aluminium
4 Reacts with platinum
Explanation:
Aluminum metal is not attacked by nitric acid of any concentration because of the thin and unreactive protective layer of aluminum oxide formed on the metallic surface due to the reaction of aluminium metal with oxygen of air.
11. THE P-BLOCK ELEMENTS
189650
Anhydrous \(AlC{l_3}\) is obtained from
1 \(HCl\) and aluminium metal
2 Aluminium and chlorine gas
3 Hydrogen chloride gas and aluminium metal
4 None of the above
Explanation:
(c) \(2Al + 6HCl \to 2AlC{l_3} + 3{H_2}\)
11. THE P-BLOCK ELEMENTS
189651
Which is true for an element \(R\) present in III group of the periodic table
1 It is gas at room temperature
2 It has oxidation state of \( + \,4\)
3 It forms \({R_2}{O_3}\)
4 It forms \(R{X_2}\)
Explanation:
(c) \(Al\) \(\to\) \(III\) group \(\to\) Forms \(A{l_2}{O_3}\)
189647
An element \(A\) dissolves both in acid and alkali. It is an example of
1 Allotropic nature of \(A\)
2 Dimorphic nature of \(A\)
3 Amorphous nature of \(A\)
4 Amphoteric nature of \(A\)
Explanation:
(d) Amphoteric substance can react with both acid and base.
11. THE P-BLOCK ELEMENTS
189648
Hydrogen gas will not reduce
1 Heated cupric oxide
2 Heated ferric oxide
3 Heated stannic oxide
4 Heated aluminium oxide
Explanation:
Aluminium oxide cannot be reduced by hydrogen even under very hot conditions because \(Al\) is more reactive than \(H\). While other oxides can be reduced by hydrogen as they are below hydrogen in the metal reactivity series.
11. THE P-BLOCK ELEMENTS
189649
Conc. \(HN{O_3}\)
1 Reacts with aluminium vigrously
2 Reacts with aluminium to form aluminium nitrate
3 Does not react with aluminium
4 Reacts with platinum
Explanation:
Aluminum metal is not attacked by nitric acid of any concentration because of the thin and unreactive protective layer of aluminum oxide formed on the metallic surface due to the reaction of aluminium metal with oxygen of air.
11. THE P-BLOCK ELEMENTS
189650
Anhydrous \(AlC{l_3}\) is obtained from
1 \(HCl\) and aluminium metal
2 Aluminium and chlorine gas
3 Hydrogen chloride gas and aluminium metal
4 None of the above
Explanation:
(c) \(2Al + 6HCl \to 2AlC{l_3} + 3{H_2}\)
11. THE P-BLOCK ELEMENTS
189651
Which is true for an element \(R\) present in III group of the periodic table
1 It is gas at room temperature
2 It has oxidation state of \( + \,4\)
3 It forms \({R_2}{O_3}\)
4 It forms \(R{X_2}\)
Explanation:
(c) \(Al\) \(\to\) \(III\) group \(\to\) Forms \(A{l_2}{O_3}\)
189647
An element \(A\) dissolves both in acid and alkali. It is an example of
1 Allotropic nature of \(A\)
2 Dimorphic nature of \(A\)
3 Amorphous nature of \(A\)
4 Amphoteric nature of \(A\)
Explanation:
(d) Amphoteric substance can react with both acid and base.
11. THE P-BLOCK ELEMENTS
189648
Hydrogen gas will not reduce
1 Heated cupric oxide
2 Heated ferric oxide
3 Heated stannic oxide
4 Heated aluminium oxide
Explanation:
Aluminium oxide cannot be reduced by hydrogen even under very hot conditions because \(Al\) is more reactive than \(H\). While other oxides can be reduced by hydrogen as they are below hydrogen in the metal reactivity series.
11. THE P-BLOCK ELEMENTS
189649
Conc. \(HN{O_3}\)
1 Reacts with aluminium vigrously
2 Reacts with aluminium to form aluminium nitrate
3 Does not react with aluminium
4 Reacts with platinum
Explanation:
Aluminum metal is not attacked by nitric acid of any concentration because of the thin and unreactive protective layer of aluminum oxide formed on the metallic surface due to the reaction of aluminium metal with oxygen of air.
11. THE P-BLOCK ELEMENTS
189650
Anhydrous \(AlC{l_3}\) is obtained from
1 \(HCl\) and aluminium metal
2 Aluminium and chlorine gas
3 Hydrogen chloride gas and aluminium metal
4 None of the above
Explanation:
(c) \(2Al + 6HCl \to 2AlC{l_3} + 3{H_2}\)
11. THE P-BLOCK ELEMENTS
189651
Which is true for an element \(R\) present in III group of the periodic table
1 It is gas at room temperature
2 It has oxidation state of \( + \,4\)
3 It forms \({R_2}{O_3}\)
4 It forms \(R{X_2}\)
Explanation:
(c) \(Al\) \(\to\) \(III\) group \(\to\) Forms \(A{l_2}{O_3}\)
