Question # 1

Chloroform (CHCl3) is?

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

a liquid

Which of the following is obtained by the hydrolysis of starch in the presence of diastase enzyme

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Lactose

Maltose

Sucrose

All of them

London forces are

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stronger than dipole-dipole interactions

weaker than dipole-dipole interactions

equal to dipole-dipole interactions

sometimes stronger and sometimes weaker than dipole-dipole interactions

The sole produets of combustion analysis are

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CO2 and NH3

H2O and Mg(CIO4)2

CO2 and KOH

CO2 and H2O

When purely alcoholic solution of sodium/potassiumhydroxide and halogenoalkanes are reacted an alkene is formed, what is the mechanism of reaction?

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Elimination

Debromination

Dehydration

Reduction

The element with highest E°red

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N

F

O

CI

Benedict solution gives a positive test with:

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glucose

frutose

sucrose

starch

The long chains of amino acids are coiled around one another into a spiral by

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ionic bond

Van der Waal's forces

hydrogen bonding

overlapping of orbitals

Which compound is obtained hy the elimination reaction on bromoethane?

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Butene

Ethene

Propene

Propane

What is true about an alcohol and phenol

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Both are more acidic than water

Both react with NaOH

Both produce CO2 with Na2CO3

Both, produce H2 with Na

Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of:

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2 days

6 days

5 days

7 days

In which of the following cases, the reaction goes farthest to completion

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K = 10³

K = 10^-2

K = 10

K = 10⁰

Metal used in the preparation of Grignard's reagent is:

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Ca

Na

Mg

Zn

Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called

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Wurtz reaction

Fitting reaction

Wurtz fitting reaction

None of these

Propanone is the product obtained by dehydrogenation of

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2-Propanol

1-Propanol

Isobutyl alcohol

Propanethoil

Chromyl chloride and toluene react to produce

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p-chlorotoluene

Benzaldehyde

Benzyl chloride

Bezoic acid

Plastics are a 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 valence shell electronic structure of an element is ns²np⁵. The element will along to the group of

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Alkali metals

Inert metals

Noble gases

Halogen

ΔH is equal to

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E + PV

E + PΔV

ΔE + P

ΔE + PΔV

An electric current is passed through silver voltameter connected to a water voltmeter. The cathode of the silver voltameter is 0.108 g more at the end of the electrolysis. The volume of oxygen evolved at STP is

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56 cm³

550 cm³

5.6 cm³

11.2 cm³

When the degree of freedom increase the entropy ______

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Decreases

Increases

Remains same

All

When 3p orbital is complete, the entering electron goes into

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4s

3d

4p

4f

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