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35 Cards in this Set
- Front
- Back
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AUTO CATALYST
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One of the products formed during the chemical reaction acts as the catslyst
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INDUCED CATALYST
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One reactant influences the rate of other reaction which otherwise does not occur under ordinary conditions
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PROMOTERS
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A substance which though not a catalyst, promotes the activity of a catalyst
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CATALYTIC POISON
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A substance which destroys the activity of a catalyst
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Acromiodeltoid Insertion:
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Surface of the Spinodeltoid muscle
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2SO2(g)+O2(g)--------->2SO2(g)
Pt-Catalyst As2O3---? |
CATALYTIC POISON---As2O3
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N2+3H2--------->2NH3
Fe-----? Mo-----? |
Fe-----Catalyst
Mo-----Promoter |
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Alcohol
2Na2SO3+O2------------>2Na2SO4 Glycerin 2H2O2-------->2H2O+O2 |
Negative catalyst
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MnO2 2KClO3------------->2KCl+3O2
Pt 2H2O2----------->2H2O+O2 |
Positive catalyst
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COOH
5 I +2KMnO4+3H2SO4--------> COOH 2MnO4+K2SO4+10CO2+8H2O |
MnSO4---Autocatalyst
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INTERMEDIATE COMPOUND FORMATION THEORY
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explains homogeneous catalysis
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ADSORPTION THEORY
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explains heterogeneous catalysis
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2NO2+O2---------->2NO2(intermediate compound)
NO2+SO2--------->SO3+NO (product) |
Intermediate compound formation theory
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ADSORPTION THEORY
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1.adsorption of reactant molecules
2.formation of activated complex 3.decomposition of activated complexes 4.desorption of products |
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Contact process of manufacture of sulphuric acid
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catalyst---platinised asbestos of vanadium penta oxide(V2O5)
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Hydrogenation of vegetable oils
oil+H2---------->vanaspathi ghee |
catalyst-finely divided nickel
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DIAMETER OF DISPERSED PARTICLE IN TRUE SOLUTION IS IN THE RANGE
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o o
1A ----10A |
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DIAMETER OF DISPERSED PARTICLE IN A COLLOID IS IN THE RANGE
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o o
10A----2000A |
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DIAMETER OF DISPERSED PARTICLE IN A SUSPENSION OR PRECIPITATE IS IN THE RANGE
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o
>2000A |
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DISPERSED PHASE
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Substance distributed as the colloidal particle
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DISPERSION MEDIUM
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The continuous phase in which the colloidal particles are dispersed
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SOLID SOL
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Ruby glass,alloys
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SOL
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paint,ink
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AEROSOL
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Smoke,haze
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GEL
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Curd,Cheese
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EMULSION
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Milk,cream
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LIQUID AEROSOL
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Cloud, mist
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SOLID FOAM
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Cork, pumice stone
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FOAM
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Froths of air
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LYOPHOBIC COLLOID
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Dispersed phase has very little affinity for dispersion medium
(eg) sulphur in water |
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LYOPHILIC COLLOIDS
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Dispersed phase has considerable affinity for dispersion medium
(eg) gelatin,protein, starch |
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DISPERSION METHODS OF PREPARATION OF LYOPHOBIC COLLOIDS
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1.Mechanical Dispersion
2.Electrical Dispersion 3.Ultrasonic Dispersion 4.Peptization |
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DISPERSION METHODS OF PREPARATION OF LYOPHOBIC COLLOIDS
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1.Exchange of solvents
2.Change of physical state 3.Chemical methods i.Double decomposition ii. oxidation iii. reduction iv. hydrolysis |
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MECHANICAL DISPERSION OF COLLOIDAL MILL
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Colloidal graphite,printing ink
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ELECTRICAL DISPERSION OR BREDIG'S ARC METHOD
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Colloidal solution of gold silver and platinum in water
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