p-Block Elements and Their Uses
Description: p-block elements B, Al, Si, N, P, and S | |
Number of Questions: 20 | |
Created by: Saurabh Mittal | |
Tags: p-block elements B, Al, Si, N, P, and S |
Which of the following wrought alloys has maximum percentage of aluminium?
Standard electrode potential values for Al3+/Al is –1.66 V and that of Tl3+/Tlis + 1.26 V. About the formation of M+/M3+ ion in solution and the electropositive character of these metals, the true statement(s) is/are A. Al and Tl form stable Al3+ and Tl3+ ions in aqueous solution. B. Tl+ is more stable than Tl3+. C. Al is more electropositive element than that of thallium.
Which of the following statement(s) is/are false?
P. Boron and Gallium form BF63- ions. Q. Alclad is the alloy of aluminium used in the formation of corrosion resistant sheet. R. Boron fibres are used in making bullet-proof vest and light composite material for aircraft.
Among the following the more stable complexes of thalium is/are
P. Tl(OH) Q. TlCl3 R. TlBr S. TlN3
Identify the incorrect statement(s) for boron.
P. Kernite is a mineral of boron. Q. 10B is more abundant isotope than11B. R. Boron has lower second ionization enthalpy than aluminium.
The general formula BnHn+6 for boranes, corresponds to
Pyrex glass is mainly a mixture of sodium borosilicate and aluminium borosilicate. Green coloured glass is made by the addition of ________.
Match the entries in Group - I (elements) with those in Group - II (frequent uses).
Group - I | Group - II |
P. B | 1. construction materials |
Q. Al | 2. coatings |
R. Ga | 3. fibreglass production |
S. In | 4. LED lighting |
Which of the following statement(s) is/are false?
P. Gallium has higher melting and boiling point than indium. Q. Tusionite is the mineral of boron. R. Gallium arsenide is used in the making of tunnel diodes for FM transmitter circuits.
Which of the following wrought aluminium alloys contain gallium?
Regarding N, Al, P and Si, the second ionization enthalpy follow the order of
Which of the following pair of ‘compounds - their respective nature’ is not correctly matched?
Which of the following group 13 elements has the highest melting point?
Match the Column - I (interhalogen compounds) with Column - II (corresponding geometry) and select the correct answer using the codes given below.
Column - I | |
Column - II | |
P. BrCl | 1. square pyramidal |
Q. IF7 | 2. linear |
R. BrF3 | 3. T-shaped |
S. IF5 | 4. pentagonal |
Which of the following statements are not correct?
P. Decaborane-14 has regular icosahedron geometry. Q. Silicon do not form [SiCl6]2- and [SiF6]2-. R. n-Type semiconductors are made by the doping of Si atoms in Ga atoms.
Match the entries in Column - I with those in Column - II.
Column - I | |
Column - II | |
P. turquoise | 1. ZnS + BaSO4 |
Q. lithopone | 2. AlPO4.Al(OH)3.H2O |
R. talc | 3. 3MgO.4SiO2.H2O |
S. diaspore | 4. Al2O3.H2O |
The ionic radii of B3+, Al3+ Si4+ and N3- varies in the order of
The oxidation state of central metal atom in ‘Lunar caustic’ is
Identify the incorrectly matched pair of ‘compound - its specific name’.
Assertion (A): BF3 is weaker Lewis acid than that of BBr3. Reason (R): BF3 has planar geometry and is stabilized to a greater extent than BBr3 by pπ-back bonding. Select the correct opinion.