Question # 1

Esters have fruity smell and are used as artificial favours. Amyl acetate gives flavour of

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Banana

Jasmine

Pineapple

Orange

Oils and fats belong to the class of

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Alcohols

Hydrocarbons

Acids

Esters

The minimum temperature recorded by Kelvin scale is:

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273K

373K

Absolute scale is unable

0K to record this temperature

Which one of the following is not a form of chemical bonding?

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covalent bonding

hydrogen bonding

ionic bonding

metallic bonding

Plastics are pollution problem because many plastics:

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are made from petroleum

are very inflammable

burn to produce toxic fumes

decompose to produce toxic products

The compound that has zero dipole moment is

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HCl

H₂S

NH₃

CH₄

Hexamethylene reacts with _______ to prepare nylon 6,6

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acetic acid

adipic acid

formic acid

none of above

Naturally occurring isotopes of silver are

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,Two

, Four

, Forty seven

, sixteen

Which of the following is more reactive where 0-H bonds break

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P°alcohol

T° alcohol

S°alcohol

Cannot be predicated

Which one of the following statements about Glucose and sucrose is incorrect?

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Both are soluble in water

Both are naturally occurring

Both are carbohydrates

Both are disaccharides

Photo chemical smog contains _________ as main reactants:

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nitrons oxide and unburnt hydrocarbons

niliric oxide and unburnt hydrocarbons

NO and burnt hydrocarbons

N₂O and burnt hydrocarbons

Which is not an essential amino acid

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Leucine

Methionine

Histidine

Lysine

Which of the following compounds contains a triple bond?

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Alkane

Alkene

Alkyne

Benzene

Which is not an enzyme

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Transverses

Lipase

Lyase

None of these

Each of the following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

Formaldehyde is used to make

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Plastics

Medicine

Antiseptic

All of these

The order of reactivity of halogens in aliphatic substitution reactions is

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Br2 > C12 > F2

C12 > Br2 > F2

C12 C12 > Br2

F2 > Br2 > C12

The strongest acid among the following aromatic compound is

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Ortho-nitrophenol

Para-chlorophenol

Para-nitrophenol

Meta-nitrophenol

Content of carbon in steel is:

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0.12 to 0.25%

0.25% to 2.5%

3.0 to 3.5%

4.0 to 4.5%

A homogeneous mixture of two or more than two chemical substances is called

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Solute

Solution

Solvent

Salvation

Which is a mixture of low boiling hydrocarbon

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Natural gas

Petroleum

Wood

Graphite

The reagent which forms crystalline osazone derivative when treated with glucose is

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Fehling solution

Phenyl hydrazine

Benedict solution

Hydroxyl amine

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