Question # 1

The heat of hydrogenation of most of the alkene is about

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120 kJ/mol

100 kJ/mol

140 kJ/mol

105 kJ/mol

Ethene is produced from ethyl chloride by reacting with alcoholic KOH. The process is called

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Hydrogenation

Dehydrogenation

Dehydrohalogenation

Oxidation

Which of these polymers is a synthetic polymer

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Starch

Animal fat

Polyester in an addition polymer

Cellulose

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

If empirical formula of a compound is CH2 and its molecular mass is 56amu. What will beits molecular formula

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CH2

C3H6

C2H4

C4H8

When stress is applied to the metals, the metals are malleable and ductile because

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their layers slip pass each other

atoms lose electrons

mobility of electrons increased

none of the above

what is the exact value of angle in BF3

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90

104.51

119.5

120°

Which pair of the gases doesn't obey Dalton's Law of partial pressures

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H₂and O₂

N₂and O₂

H₂S and H₂

NH₃and HCl

SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode

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Zn has less reduction potential than hydrogen and Cu

Zn has high reductionl potential than hydrogen

and Cu

Zn is below electrochemical series than hydrogen and Cu

Zn has least tendency to lose electron

The %age composition of the auxiliary agent in a detergent is:

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10%

30%

50%

70%

If a salt bridge is removed from two half cells the emf is

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Increased

Decreased

Dropped to zero

Electrodes will be reversed

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di(4-bormophenyl) method

Methanol

Propan-1-ol

Propan-2-ol

Alkyle halides can be prepared by treating halogen acids with

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Ethane

Ethanol

Ethene and ethanol

Aldehyde

The substance which is present in large quantity is called a :

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Solute

Solvent

solutiion

None of Above

Which factor is helping to reduce the environmental pollution

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Rapid growth of population

Urbanization

Industrialization

Increase of plantation

Heat absorbed or released during the chemical reaction of physical process at constant pressure is equal to

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Which is not the form of silica?

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Amethyst quatz

Rose quatz

Smoky

None of these

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

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Fibre

Plastic

Varnish

Polyamide resin

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

Composition of clay in cement is:

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25%

50%

75%

80%

The proteins which are derived by conjugated proteins are called as

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Simple protein

Complex protein

Derived protein

None

Electronic configuration of Cu⁺²is

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4S², 3d⁹

4s^-1, 3d¹⁰

4S⁰, 3d⁹

None of these

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