a) Cu(NO ) , NO and NO b) Cu(NO ) and N O c) Cu(NO ) and NO d) Cu(NO ) and NO Answer the following questions: . What is inert pair effect? . Chalcogens belongs to p-block.
Give reason. . Explain why fluorine always exhibit an oxidation state of - ? .
Give the oxidation state of halogen in the following. a) OF b) O F c) Cl O d) I O . What are interhalogen compounds? Give examples.
. Why fluorine is more reactive than other halogens? . Give the uses of helium.
. What is the hybridisation of iodine in IF ? Give its structure. .
Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH. . How will you prepare chlorine in the laboratory? .
Give the uses of sulphuric acid. . Give a reason to support that sulphuric acid is a dehydrating agent. .
Write the reason for the anomalous behaviour of Nitrogen. . Write the molecular formula and structural formula for the following molecules. a) Nitric acid b) dinitrogen pentoxide c) phosphoric acid d) phosphine XII XII - - - - .
Give the uses of argon. . Write the valence shell electronic configuration of group- elements. .
Give two equations to illustrate the chemical behaviour of phosphine. . Give a reaction between nitric acid and a basic oxide. .
What happens when PCl is heated? . Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids. .
Deduce the oxidation number of oxygen in hypofluorous acid – HOF. . What type of hybridisation occur in a) BrF b) BrF . Complete the following reactions.
. NaCl + MnO + H SO . NaNO + HCl . P + NaOH + H O .
AgNO + PH . Mg + HNO . KClO ∆ . Cu + H SO Hot conc .