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Catalytic property and formation of industrial compounds in transition elements

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Catalytic Property :- Transition element shows catalytic property due to following reason (a) Such elements are in solid state so reaction is taken on its surface. (b) Tendency to show variable oxidation state. (c) Presence of empty d-orbital. (d) They have small size. Ex:- Pd,Pt,Ni,Co Mn V are the most popular transition metal with shows …

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Preparation of nitrogen and use of nitrogen.

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Nitrogen (N2) It is known as foul gas means it not support in combustion. Preparation By Lab method :- In lab it is prepared heating of Ammonium nitrate. NH4NO2 N2 + 3H2O (Ammonium nitrite) By heating of Ammonium dichromate …

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Preparation of nitric acid(HNO3),Ostwald process,Brikeland Eye process

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Preparation of nitric acid(HNO3),Ostwald process,Brikeland Eye process HNO3(Nitric acid) It is one of the important Oxo-acid of Nitrogen.In such Oxo-acid Nitrogen has +5 oxidation state. HNO3 1+x-5=0 X=+5 Preparation of HNO3 (I) Lab method :- When potassium nitrate is treated with Sulphuric acid then nitric acid is obtained. KNO3+H2SO4→KHSO4+HNO3 (II.) Commercial method :- Nitric acid …

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Extraction of iron by haematite ore(Fe2O3).

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Extraction of iron by haematite ore(Fe2O3). Extraction of Iron :- Iron is extracted by haemetite are which consist impurity of silica , phosphorus , carbon etc. Extraction of it completed in following steps :- Concentration of Ore :- Such ore is concentration by gravity separation or Hydraulic washing. Calcination :- Concentrated is strongly heated in …

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Bihar board most important long question answer

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Question No. 1 to 10 are short answer type. Answer any 10 question. Each question carries 2 marks. 1.What are f-centres in a crystal? 2- Silver crystalline with FCC unit cell. Each side of unit cell has length of 409pm. What is the radius of Ag atom? 3- what is half life period? …

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Adsorption isobar and Catalyst explain with example.

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Adsorption Isobar Knowing the effect of temperature on adsorption we plot a graph between rate of adsorption and temperature at constant Pressure is called adsorption isobar. Case-1 In chemical adsorption initially rate of adsorption increase by increase in Temperature after that it decreases by increase in temperature. Case-2 In physical adsorption rate of adsorption …

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Difference between Adsorption and Absorption

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Difference between Adsorption and Absorption Adsorption Absorption It is surface phenomena. It is bulk phenomena. Molecules are present more over the surface then bulk Molecules are evenly distributed. Initially rate of adsorption is fast then it decreases. The rate if adsorption is same through out the surface. Ex.-adsorption of water vapourBy silica …

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Concentration of solution and Colligatives properties

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BOARD MOST IMPORTANT QUESTION The density of a solution containing 13% by mass of sulphuric acid is 1.09 g/ml. Calculate the molarity and normality of the solution- (A) 1.445 M (B) 14.45 M (C) 144.5 M (D) 0.1445 M Calculate the molarity of pure water (d = 1 g/L) (A) …

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