The tendency to exhibit —3 oxidation state decreases down the group due to increase in size and metallic group. In the last member of the group, bismuth hardly forms any compound in —3 oxidation state.
Because of the extra stable half filled p orbitals electronic configuration and smaller size, the ionization enthalpy of the group 15 elements is much greater than that of group 14 elements in the corresponding periods. However, amongst the heavier elements, the different is not that much pronounced.
Chapter Chosen The p-Block Elements. Book Chosen Chemistry I. Subject Chosen Chemistry. Book Store Download books and chapters from book store. Currently only available for. Class 10 Class The p-Block Elements. H 2 O is a liquid at room temperture because it is highly associated via intermolecular hydrogen bonding.
H 2 S, due to large size of sulphur cannot form hydrogen bonding. Therefore, H 2 S is a discrete molecule and the intermolecular forces of attraction are weak Van der Waal's forces. Hence, H 2 ,S is a gas at room temperature. Switch Flag Bookmark. List the uses of neon and argon gases. Write main differences between the properties of white phosphorus and red phosphorus.
Properties White Phosphorus Red phosphorus 1. Colour White but turns Dark red yellow on exposure 2. State Waxy solid Brittle powder 3. Q9 What happens when PCl 5 is heated? Q10 Write a balanced equation for the hydrolytic reaction of PCl 5 in heavy water. Q11 What is the basicity of H 3 PO 4? Q12 What happens when H 3 PO 3 is heated?
Q13 List the important sources of sulphur. Q14 Write the order of thermal stability of the hydrides of Group 16 elements. Q16 Which of the following does not react with oxygen directly? Q18 Why does O 3 act as a powerful oxidising agent? Q19 How is O 3 estimated quantitatively? Are the two S-O bonds in this molecule equal? Q22 How is the presence of SO 2 detected?
Q23 Mention three areas in which H 2 SO 4 plays an important role. Q26 Considering the parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy, com Q27 Give two examples to show the anomalous behaviour of fluorine. Q28 Sea is the greatest source of some halogens. Q29 Give the reason for bleaching action of Cl 2.
Q30 Name two poisonous gases which can be prepared from chlorine gas. Q31 Why is ICl more reactive than I 2? Q32 Why is helium used in diving apparatus? Q34 Why has it been difficult to study the chemistry of radon? Previous Question Next Question. Popular Questions of Class 12 Chemistry Q:- Give simple chemical tests to distinguish between the following pairs of compounds.
Q:- H 2 S, a toxic gas with rotten egg like smell, is used for the qualitative analysis. Recently Viewed Questions of Class 12 Chemistry Q:- What is the significance of leaching in the extraction of aluminium? Q:- Actinoid contraction is greater from element to element than lanthanoid contraction. Q:- The decomposition of A into product has value of k as 4. Q:- Based on solute-solvent interactions, arrange the following in order of increasing solubility in n-octane and explain.
Q:- A solution of Ni NO 3 2 is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes.
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