:Why is transistor used as a switch? :Describe the following:(i) Acetylation (ii) Cannizzaro reaction (iii) aldol condensation (iv) Decarboxylation (v) Diazotisation :Why does nitrogen show catenation properties less than phosphorus? :Why are halogens strong oxidising agents? :How are XeO3 and XeOF4 prepared? : Write balanced equations when NaCl is heated with sulphuric acid in the presence of MnO2 : Give the disproportionation reaction of H3PO3. :] What do you understand by the term glycosidic linkage? :What is glycogen? How is it different from starch? [iii] What are the hydrolysis products of (i) sucrose and (ii) lactose :Distinguish by a chemical test – (a) Acetaldehyde and acetone (b) Methyl amine and dimethyl amine (c) Phenol and benzoic acid. :What happens when ethanol is heated with sulphuric acid at 413 K.? Explain mechanism of the reaction ? : Why do noble gases have comparatively large atomic sizes? : Why is dioxygen a gas but sulphur a solid? : Why does R3P = O exist but R3N = O does not ? :Explain: (i) Zone refining (ii) Column chromatography :Discuss briefly giving an example the role of coordination compounds in biological systems :What is spectrochemical series? : write the formula for the Tetrahydroxozincate(II) : Conductivity of 0.00241 M acetic acid is 7.896 × 10–5 S cm–1. Calculate its molar conductivity and if for acetic acid is 390.5 S cm2 mol–1, what is its dissociation constant? : Calculate the mass of a non- volatile solute (molar mass 40 g mol–1) which should be dissolved in 114 g octane to reduce its vapour pressure to 80% :What is meant by the term ‘broad spectrum antibiotics’ ? Explain.? :Explain the term copolymerisation and give two examples? : [NiCl4]2– is paramagnetic while [Ni(CO)4] is diamagnetic though both are tetrahedral. Why? :Convert- (a) 2-Chlorobutane to 3, 4-dimethylhexane (b) 2- Methyl-1-propene to 2-chloro-2- methylpropane : Explain the following about the transition elements- (a) Paramagnetic nature (b) Complex formation :Write the chemistry of recharging the lead storage battery, highlighting all the materials that are involved during recharging. : State Henry’s law and mention some important applications :Silver forms ccp lattice and X-ray studies of its crystals show that the edge length of its unit cell is 408.6 pm. Calculate the density of silver (Atomic mass = 107.9 u) :Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it : What are the advantage of artificial sweeteners ? : Write the formula of the monomer used in the coating of non- stick cook wares ?

chetan prasad mishra

12 Years agoGrade Upto college level