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Answered May 9, · Author has answers and k answer views You can download it from here [PDF] Xam Idea Chemistry Class 12 PDF Free. View chem class 12 xam aracer.mobi from CHEMISTRY 1 at Silver Bells Institute For Higher Education. CHEMISTRY Examination Papers CONTENT n. The books exhibit material that are in compliance with CBSE examination paper design. All the chapters of each book is divided into 2 sections: Part-A and.
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List the reactions of glucose which cannot be explained by its open chain structure. Assign a reason for each of the following statements: i Ammonia is a stronger base than phosphine. Draw the structure of the following molecules: i SF4 ii XeF4 What are biodegradable and non-biodegradable detergents? Give one example of each class.
What is a semiconductor?
Describe the two main types of semiconductors and explain mechanisms for their conduction. Calculate the temperature at which a solution containing 54 g of glucose, C 6 H12 O6 , in g of water will freeze.
What are lyophilic and lyophobic sols? Give one example of each type. Which one of these two types of sols is easily coagulated and why? State briefly the principles which serve as basis for the following operations in metallurgy: i Froth floatation process ii Zone refining iii Refining by liquation Write chemical equations for the following processes: i Chlorine reacts with a hot concentrated solution of sodium hydroxide.
Give an example of a bidentate ligand.
Name the reagents which are used in the following conversions: i A primary alcohol to an aldehyde ii Butanone to butanol iii Phenol to 2, 4, 6-tribromophenol Account for the following observations: i pK b for aniline is more than that for methylamine. Examination Papers 5 Write the names and structure of the monomers of the following polymers: i Buna-S ii Neoprene iii Nylon-6 Conductivity of 0. Calculate its molar conductivity in this solution.
OR Three electrolytic cells A, B and C containing solutions of zinc sulphate, silver nitrate and copper sulphate, respectively are connected in series. A steady current of 1. How long did the current flow? What mass of copper and what mass of zinc were deposited in the concerned cells? Assign reasons for the following: i The enthalpies of atomisation of transition elements are high.
OR a What may be the possible oxidation states of the transition metals with the following d electronic configurations in the ground state of their atoms: 3d 3 4s 2 , 3d 5 4s 2 and 3d 6 4s 2. Indicate relative stability of oxidation states in each case.