Preparation and Properties of Aluminium, its Compounds and Alum
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CHXI11:THE P-BLOCK ELEMENTS

316906 Which of the following is a Lewis acid ?

1 \(\mathrm{AlCl}_{3}\)
2 \(\mathrm{MgCl}_{2}\)
3 \(\mathrm{CaCl}_{2}\)
4 \(\mathrm{BaCl}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316909 Aluminium is extracted from alumina \(\left(\mathrm{Al}_{2} \mathrm{O}_{3}\right)\) by electrolysis of molten mixture of

1 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{Na}_{3} \mathrm{AlF}_{6}+\mathrm{CaF}_{2}\)
2 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{KF}+\mathrm{Na}_{3} \mathrm{AlF}_{6}\)
3 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{HF}+\mathrm{NaAlF}_{4}\)
4 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{CaF}_{2}+\mathrm{NaAlF}_{4}\)
CHXI11:THE P-BLOCK ELEMENTS

316910 Aluminium deposited as vapours on glass forms a good mirror, essentially because:

1 It has better shine than \(\mathrm{Ag}\)
2 It does not scratch
3 Coating is much smoother
4 It does not tarnish in air
CHXI11:THE P-BLOCK ELEMENTS

316911 The complex formed when \(\mathrm{Al}_{2} \mathrm{O}_{3}\) is leached from bauxite using concentrated \(\mathrm{NaOH}\) solution is

1 \(\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right]\)
2 \(\mathrm{NaAl}_{2} \mathrm{O}_{4}\)
3 \(\mathrm{Na}_{2}\left[\mathrm{Al}(\mathrm{OH})_{3}\right]\)
4 \(\mathrm{Na}_{2} \mathrm{AlO}_{2}\)
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316912 Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

1 Oxygen forms a protective oxide layer on aluminium
2 Aluminium is a noble metal
3 Iron undergoes reaction easily with water
4 Iron forms tri and divalent ions
Join With Us for More Updates
CHXI11:THE P-BLOCK ELEMENTS

316906 Which of the following is a Lewis acid ?

1 \(\mathrm{AlCl}_{3}\)
2 \(\mathrm{MgCl}_{2}\)
3 \(\mathrm{CaCl}_{2}\)
4 \(\mathrm{BaCl}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316909 Aluminium is extracted from alumina \(\left(\mathrm{Al}_{2} \mathrm{O}_{3}\right)\) by electrolysis of molten mixture of

1 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{Na}_{3} \mathrm{AlF}_{6}+\mathrm{CaF}_{2}\)
2 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{KF}+\mathrm{Na}_{3} \mathrm{AlF}_{6}\)
3 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{HF}+\mathrm{NaAlF}_{4}\)
4 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{CaF}_{2}+\mathrm{NaAlF}_{4}\)
CHXI11:THE P-BLOCK ELEMENTS

316910 Aluminium deposited as vapours on glass forms a good mirror, essentially because:

1 It has better shine than \(\mathrm{Ag}\)
2 It does not scratch
3 Coating is much smoother
4 It does not tarnish in air
CHXI11:THE P-BLOCK ELEMENTS

316911 The complex formed when \(\mathrm{Al}_{2} \mathrm{O}_{3}\) is leached from bauxite using concentrated \(\mathrm{NaOH}\) solution is

1 \(\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right]\)
2 \(\mathrm{NaAl}_{2} \mathrm{O}_{4}\)
3 \(\mathrm{Na}_{2}\left[\mathrm{Al}(\mathrm{OH})_{3}\right]\)
4 \(\mathrm{Na}_{2} \mathrm{AlO}_{2}\)
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316912 Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

1 Oxygen forms a protective oxide layer on aluminium
2 Aluminium is a noble metal
3 Iron undergoes reaction easily with water
4 Iron forms tri and divalent ions
For More Updates join with Us
CHXI11:THE P-BLOCK ELEMENTS

316906 Which of the following is a Lewis acid ?

1 \(\mathrm{AlCl}_{3}\)
2 \(\mathrm{MgCl}_{2}\)
3 \(\mathrm{CaCl}_{2}\)
4 \(\mathrm{BaCl}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316909 Aluminium is extracted from alumina \(\left(\mathrm{Al}_{2} \mathrm{O}_{3}\right)\) by electrolysis of molten mixture of

1 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{Na}_{3} \mathrm{AlF}_{6}+\mathrm{CaF}_{2}\)
2 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{KF}+\mathrm{Na}_{3} \mathrm{AlF}_{6}\)
3 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{HF}+\mathrm{NaAlF}_{4}\)
4 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{CaF}_{2}+\mathrm{NaAlF}_{4}\)
CHXI11:THE P-BLOCK ELEMENTS

316910 Aluminium deposited as vapours on glass forms a good mirror, essentially because:

1 It has better shine than \(\mathrm{Ag}\)
2 It does not scratch
3 Coating is much smoother
4 It does not tarnish in air
CHXI11:THE P-BLOCK ELEMENTS

316911 The complex formed when \(\mathrm{Al}_{2} \mathrm{O}_{3}\) is leached from bauxite using concentrated \(\mathrm{NaOH}\) solution is

1 \(\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right]\)
2 \(\mathrm{NaAl}_{2} \mathrm{O}_{4}\)
3 \(\mathrm{Na}_{2}\left[\mathrm{Al}(\mathrm{OH})_{3}\right]\)
4 \(\mathrm{Na}_{2} \mathrm{AlO}_{2}\)
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316912 Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

1 Oxygen forms a protective oxide layer on aluminium
2 Aluminium is a noble metal
3 Iron undergoes reaction easily with water
4 Iron forms tri and divalent ions
NEET DIGITAL LIBRARY
CHXI11:THE P-BLOCK ELEMENTS

316906 Which of the following is a Lewis acid ?

1 \(\mathrm{AlCl}_{3}\)
2 \(\mathrm{MgCl}_{2}\)
3 \(\mathrm{CaCl}_{2}\)
4 \(\mathrm{BaCl}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316909 Aluminium is extracted from alumina \(\left(\mathrm{Al}_{2} \mathrm{O}_{3}\right)\) by electrolysis of molten mixture of

1 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{Na}_{3} \mathrm{AlF}_{6}+\mathrm{CaF}_{2}\)
2 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{KF}+\mathrm{Na}_{3} \mathrm{AlF}_{6}\)
3 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{HF}+\mathrm{NaAlF}_{4}\)
4 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{CaF}_{2}+\mathrm{NaAlF}_{4}\)
CHXI11:THE P-BLOCK ELEMENTS

316910 Aluminium deposited as vapours on glass forms a good mirror, essentially because:

1 It has better shine than \(\mathrm{Ag}\)
2 It does not scratch
3 Coating is much smoother
4 It does not tarnish in air
CHXI11:THE P-BLOCK ELEMENTS

316911 The complex formed when \(\mathrm{Al}_{2} \mathrm{O}_{3}\) is leached from bauxite using concentrated \(\mathrm{NaOH}\) solution is

1 \(\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right]\)
2 \(\mathrm{NaAl}_{2} \mathrm{O}_{4}\)
3 \(\mathrm{Na}_{2}\left[\mathrm{Al}(\mathrm{OH})_{3}\right]\)
4 \(\mathrm{Na}_{2} \mathrm{AlO}_{2}\)
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316912 Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

1 Oxygen forms a protective oxide layer on aluminium
2 Aluminium is a noble metal
3 Iron undergoes reaction easily with water
4 Iron forms tri and divalent ions
Join With Us for More Updates
CHXI11:THE P-BLOCK ELEMENTS

316906 Which of the following is a Lewis acid ?

1 \(\mathrm{AlCl}_{3}\)
2 \(\mathrm{MgCl}_{2}\)
3 \(\mathrm{CaCl}_{2}\)
4 \(\mathrm{BaCl}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316909 Aluminium is extracted from alumina \(\left(\mathrm{Al}_{2} \mathrm{O}_{3}\right)\) by electrolysis of molten mixture of

1 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{Na}_{3} \mathrm{AlF}_{6}+\mathrm{CaF}_{2}\)
2 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{KF}+\mathrm{Na}_{3} \mathrm{AlF}_{6}\)
3 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{HF}+\mathrm{NaAlF}_{4}\)
4 \(\mathrm{Al}_{2} \mathrm{O}_{3}+\mathrm{CaF}_{2}+\mathrm{NaAlF}_{4}\)
CHXI11:THE P-BLOCK ELEMENTS

316910 Aluminium deposited as vapours on glass forms a good mirror, essentially because:

1 It has better shine than \(\mathrm{Ag}\)
2 It does not scratch
3 Coating is much smoother
4 It does not tarnish in air
CHXI11:THE P-BLOCK ELEMENTS

316911 The complex formed when \(\mathrm{Al}_{2} \mathrm{O}_{3}\) is leached from bauxite using concentrated \(\mathrm{NaOH}\) solution is

1 \(\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right]\)
2 \(\mathrm{NaAl}_{2} \mathrm{O}_{4}\)
3 \(\mathrm{Na}_{2}\left[\mathrm{Al}(\mathrm{OH})_{3}\right]\)
4 \(\mathrm{Na}_{2} \mathrm{AlO}_{2}\)
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316912 Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

1 Oxygen forms a protective oxide layer on aluminium
2 Aluminium is a noble metal
3 Iron undergoes reaction easily with water
4 Iron forms tri and divalent ions