What type of hydrides are formed by group 15 elements. Discuss their characteristics under the following heads.
(i) Thermal stability
(ii) Basic character
(iii) Reducing character
(iv) Bond angles
(v) Boiling points.

What type of halides are formed by group 15 elements? Discuss their structures and important characteristics.

Discuss the trend of the following (i) Thermal stability of carbonates of Group 2 elements. (ii) The solubility and the nature of oxides of Group 2 elements.

Amoung the hydrides of Group - 15 elements , which have the : (a) lowest boiling point ? " " (ii) maximum basic character ? (iii) highest bond angle ? " "

Among the hydrides of the members of oxygen family, which has (1) Lowest boiling point (ü) Highest reducing character (ii) Highest thermal stability (iv) Weakest acidic character?

Fifth group elements form hydrides to type AH_(3) . The hydrides have a lone pair of electrons. The hydries are reducing in nature and the reducing power is related to the stability of A-H bonds. The hydrides are covalent and low boiling. Their boiling points depends on their ability to from hydrogen bond and their molecular size which decide the intermolcular forces in the hydrides . The boiling points of the hydrides of V-group elements are in the order :

Fifth group elements form hydrides to type AH_(3) . The hydrides have a lone pair of electrons. The hydries are reducing in nature and the reducing power is related to the stability of A-H bonds. The hydrides are covalent and low boiling. Their boiling points depends on their ability to from hydrogen bond and their molecular size which decide the intermolcular forces in the hydrides . The H-M-H bond angle of V group hydrides decrease from 107^(circ) to 90^(circ) for NH_(3) to SbH_(3) , this is due to:

Fifth group elements form hydrides to type AH_(3) . The hydrides have a lone pair of electrons. The hydries are reducing in nature and the reducing power is related to the stability of A-H bonds. The hydrides are covalent and low boiling. Their boiling points depends on their ability to from hydrogen bond and their molecular size which decide the intermolcular forces in the hydrides . Reducing power of V-group hydrides are in order :

State the position [group] in the periodic table to which the following metals belong (i) Na-alkali metal (ii) Mg-alkaline earth metal (iii) Fe & Zn transtion elements (iv) inner transition elements [metals]. (v) Al

The decreasing order of basic characters of the following is : (I) Aniline (II) o-Nitroaniline (III) m-Nitroaniline (IV) p-Nitroaniline.

How do the following properties of group 1 and group 2 elements vary with increase in atomic number? (i) Atomic and ionic radii (ii) Density (iii) Melting and boiling points (iv) Electropositive character Give suitable explanation for the variation in each case.