Surface chemistry Flashcards by Bhargavi Singh

Q

examples of O/W

A

milk and vanishing cream

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Q

emulsifying agent for O/W

A

proteins, gums, natural and synthetic soap

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Q

examples of W/O

A

butter, cream

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Q

emulsifying agent for W/O

A

heavy metal salts of fatty acids, lampblack, long chain alcohols

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Q

solid in solid

A

Solid sol

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Q

gas in solid

A

Solid sol

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Q

solid in gas

A

aerosol

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Q

liquid in gas

A

aerosol

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Q

solid in liquid

A

sol

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Q

Liquid in solid

A

gel

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Q

gas in liquid

A

foam

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Q

liquid in liquid

A

emulsion

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Q

coloured glasses and gemstones are examples of

A

solid in solid (solid sol)

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Q

Pumice stone, foam, rubber are examples of

A

Gas in solid(solid sol)

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Q

smoke, dust are examples of

A

solid in gas(aerosol)

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Q

fog, mist, cloud, insecticide are examples of

A

Liquid in gas(aerosol)

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Q

paints and cell fluids are examples of

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A

Solid in liquid (sol)

Q

Cheese, jellies are examples of

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A

Liquid in solid (gel)

Q

Froth, whipped cream, soap lather are examples of

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A

gas in liquid (foam)

Q

Milk, hair cream, butter are examples of

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A

Liquid in liquid (emulsion)

Q

CO with 3H2 and Ni are examples of

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A

Methane (CH4)

Q

CO with 2H2 and Cu or ZnO+Cr2O3 catalyst gives

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A

Methanol(CH3OH)

Q

CO with H2 and Cu catalyst gives

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A

Formaldehyde (HCHO)

Q

Which enzyme converts sucrose to glucose and fructose

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A

Invertase

Which enzyme converts glucose to ethyl alcohol and CO2

Zymase

Which enzyme converts starch to maltose

Diastase

Which enzyme converts maltose to glucose

Maltase

Which enzyme converts urea to ammonia and CO2

Urease

Which enzyme converts proteins to amino acids?

Pepsin

Which enzyme converts milk to curd

Lacto bacilli

Source for Invertase, Zymase, Maltase

Yeast

Source of Diastase

Malt

source of Urease

Soyabean

Hydrated metallic oxides are

positively charged sol

Basic dyes like methylene blue are

positively charged sol

Haemoglobin is

positively charged sol

Oxides are

positively charged sol

Metallic sulphides are

Negatively charged sol

Metals are

Negatively charged sol

Acid dyes like eosin, Congo red are

Negatively charged sol

Starch, gum, clay, charcoal, gelatin

Negatively charged sol