The correct increasing order of tendency for catenation among group 14 elements?
1.
2.
3.
4.
Silicon has a strong tendency to form polymers like silicones. The chain length of silicone polymer can be controlled by adding
1.
2.
3.
4.
The correct order of Ionization enthalpy (∆iH kJ mol-1) for the elements of group 13 among the following is-
1. B > Al > Ga > In > Tl
2. B < Al < Ga < In < Tl
3. B < Al > Ga < In < Tl
4. B > Al < Ga > In < Tl
In the structure of diborane,
1. | All hydrogen atoms lie in one plane and boron atoms lie in a plane perpendicular to this plane. |
2. | 2 boron atoms and 4 terminal hydrogen atoms lie in the same plane and 2 bridging hydrogen atoms lie in the perpendicular plane |
3. | 4 bridging hydrogen atoms and boron atoms lie in one plane and two terminal hydrogen atoms lie in a plane perpendicular to this plane |
4. | All the atoms are in the same plane |
Identify the correct resonance structures of carbon dioxide from one given below
a.
b.
c.
d.
Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)
A compound X, of boron, reacts with NH3 on heating to give another compound Y which is called inorganic benzene. The compound X can be prepared by treating BF3 with lithium aluminum hydride. The compounds X and Y are represented by the formulas.
1. B2H6, B3N3H6
2. B2O3, B3N3H6
3. BF3, B3N3H6
4. B3N3H6, B2H6
Quartz is extensively used as a piezoelectric material, it contains-
1. Pb
2. Si
3. Ti
4. Sn
The most commonly used reducing agent among the following is :
1. AlCl3
2. PbCl2
3. SnCl4
4. SnCl2
Dry ice is-
1. Solid NH3
2. Solid SO2
3. Solid CO2
4. Solid N2
Cement, the important building material is a mixture of oxides of several elements. Besides calcium, iron, and sulphur oxides of elements of which of the group(s) are present in the mixture?
1. Group 2
2. Groups 2, 13, and 14
3. Groups 2, and 13
4. Groups 2, and 14