Question # 1

In which of these processes are smell organic molecules made into macromolecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

In electrolysis of NaCl when Pt electrode is taken then H₂is liberated at cathode while with Hg cathode it forms sodium amalgam

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Hg is more inert than Pt

More voltage is required to deduce H⁺at Hg than Pt

Na is dissolved in Hg while it does not dissolve in Pt

Conc. of H⁺ions is larger when Pt electrode is taken

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With H₂/Ni CH₃(CH₂)₅CH₂OH

With H₂/Ni CH₃(CH₂)₅CH₃

With NaBH₄ CH₃(CH₂)₅CH₂OH

With NaBH₄ CH₃(CH₂)₅CHO

Coal is used to bake bricks in lime kiln:

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40%

60%

80%

None of these

In which of the following theories the hybridizationis considered

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Vsepr

Lewis

Molecule orbital

Valence bond

E₂has molecularity :

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One

Two

Three

Half

On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives

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Methyl alcohol

Ethyl alcohol

Ethyl hydrogen sulphate

Methyl hydrogen sulphate

5g of glucose is dissolved fro 100 cm of solution. Percentage of solution is :

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5 % v/w

5 % w/v

5 % w/w

A solution containing 5.8 grams acetone (CH₃OCH₃), 4.6 gram ethyl alcohol (C₂H₅OH) and 12 grams chloroform (CHl₃) has mole fraction and mole percent of acetone

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0.11, 10%

0.33, 33%

0.22, 22%

0.11, 33%

Alkyl halides react with Mg in dry ether to form

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Magnesium halide

Grignard's reagent

Alkene

Alkyne

The gasoline having octane No. 100 has ______

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More knocking

Less knocking

No knocking

Only knocking

Polyanion formation is maximum in

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Nitrogen

Oxygen

Sulphur

Boron

Which of the following is not isoelectronic?

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Na⁺

Mg²⁺

O^2-

Cl^-

Which is a protein?

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Nylon

Rayon

Natural silk

Terylene

The sum of mole fractions (X) of components of solution is equal to

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100

200

One

Zero

An electron has principal quantum number 3. The number of its 1 subshell and 2 orbitals would be respectively

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3 and 5

3 and 7

3 and 9

2 and 5

Cell potential depends upon :

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Concentration of ions

Nature of electrolyte

Temperature

All of above

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

In endothermic reaction, the heat content of the

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Products is more than that of reactants

Reactants is more than that of products

Both a and b

None of the above

For the carbylamine reaction we need hot alc.KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Quantum number values for 2p orbitals are

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n = 2, l = 1

n = 1, l = 2

n = 1, l = 0

n = 2, l = 0

Which of the following is a member of -block

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Zn

Al

B

Br

Corrosion may be prevented by

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Allcying

Paints

Metallic coatings

All

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

Synthetic rubber is made by polymerization of

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Chloroform

Acetylene

Divinlacetylene

Butene

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

Which of the following is not related to transition metals

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They have a high tensile strength

They are ductile

They are malleable

They have low melting points

In molecules kinetic and potential energies are:

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Definite

Moderate

Indefinite

None of above

The molal depression constant depends upon

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Nature of solute

Nature of solvent

Δ H_solution

Vapour pressure of solution

Self condensation of acetaldehyde in the presence of dilute alkalies gives

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An acetal

An aldol

Mesitylene

Propionaldehyde

A solution sucrose is 34.2%. The volume of solution containing one mole of solute :

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342cm³

1000cm³

500cm³

242cm³

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