1 .Write the acidic, basic and amphoteric oxide of group 15th2.Nitrogen has 5 oxides like N2O, NO, N2O3, NO2 and N2O5 with oxidation number 1,2,3,4 and 5 respectively.3. Identify the acidic and neutral oxides and also arrange them in INCREASING order of acidic character 4.Why nitric oxides behave as free RADICAL?5.Why nitrogen dioxide is known as nitronium nitrate?6. (SiH3)3N is a planer while (CH3)3N is pyramidal in shape. 7.Reason8. What are oxo-acids or oxy-acidsWhat is fisher salt?9.Except nitrogen all elements of group 15 FORMS sulphite. Reason10.Name the all three types of hydrides of nitrogen with chemical formula and also find the hybridization of N atom in allWhy does R3P = O exist but R3N = O does not (R = alkyl group)?11.In the lab preparation methods of ammonia, quick lime (CaO) is used to remove the moisture while other dehydrating agents like CaCl2, P2O5 and H2SO4 are not used. ReasonAmmonia is collected over water. 12.Why?Name one purification process where ammonia is obtained as side productManufacturing of ammonia by Haber process and discuss on the conditions favorable for the haber processDifference between red phosphorus and white phosphorus13.Name the two forms of black phosphorus14.Preparation method and properties of phosphineUses of phosphine15.Prove that phosphine is basic in natureBond angle in PH4+ is HIGHER than that in PH3. Why?16.Why does PCl3 fume in moisture?Ionized form of PCl5Special attention on the GIVEN table content and their structures