The incorrect statement among the following is -
1. is more stable than
2. is less stable than but is more stable than
3. is less stable than
4. Pb(II) is a good reducing agent while Sn(II) is not
Quartz is made of silicon and oxygen joined in a network arrangement that is similar to:
1. Diamond
2. Graphite
3.
4. None of the above
Aluminium chloride in acidified aqueous solution forms a complex 'A'.
The formula of A and hybridisation state of Al in 'A' is respectively:
1. [Al(H2O)6]3+, sp3d2
2. [Al(H2O)4]3+, sp3
3. [Al(H2O)4]3+, dsp2
4. [Al(H2O)]3+, d2sp3
In diborane, the two H-B-H angles are nearly-
1.
2.
3.
4.
The products formed on heating Pb(NO3)2
1.
2. Pb(NO2
3.
4.
Select the correct statement(s) regarding the following reaction sequence:
1. The compound (A) is
2. The compound D is SiC
3. The compound (B) is
4. All of the above
on hydrolysis gives -
1.
2.
3.
4.
Ionization enthalpy () for the elements of Group 13 follows the order.
1. | B > Al > Ga > In > Tl | 2. | B < Al < Ga < In < Tl |
3. | B < Al > Ga < In > Tl | 4. | B > Al < Ga > In < Tl |
A compound X, of boron, reacts with on heating to give another compound Y which is called inorganic benzene. The compound X can be prepared by treating with Lithium aluminium hydride. The compounds X and Y are represented by the formulas -
1. | \(\mathrm{B}_2 \mathrm{H}_6, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 2. | \(\mathrm{B}_2 \mathrm{O}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) |
3. | \(\mathrm{BF}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 4. | \(\mathrm{B}_3 \mathrm{~N}_3 \mathrm{H}_6, \mathrm{~B}_2 \mathrm{H}_6\) |
Carbon dioxide is a gas but silica is a solid because:
1. Carbon dioxide is composed of discrete covalent molecules whereas silica has a continuous tetrahedral structure.
2. molecules are lighter than molecules.
3. is more acidic than .
4. The melting point of silica is very high.