Question # 1

Identify an oxygenated cyclic terpenoid

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a- pinene

Camphor

Citral

Geranial

The common host compound for the formation of inclusion compound is.

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Urea

Thiourea

Cholic acid

All above

Acid rain effects

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Human being

Crops

Aquatic life

All above

What is a process for making glass reinforced shapes that can be general by polling resin impregnated glass stands though a die.

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Continuous pultrusion

Bulk molding

Vacuum bag forming

Computational analysis

Nitrogen (N2)) is relatively unreactive because.

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Its electronegativity is high

Its dissociation energy is large

Its atomic radius is small

It is the first element of group 15

The oxidation state of Pt in Xe+ [Pt F6] is

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+4

+5

+6

None of these

In a system of designating wrought aluminum alloys a sour digit number is used what does the first digit indicate.

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The purity of aluminum

The identity of the alloy

The alloy group

All of above

Water pollution is due to

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Agricultural discharges

Swages and other wastes

Industrial effects

All the above

The Langmuir adsorption iso therrn shows that the amount of adsorbed gas per gram of the solid is equal to.

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ap/1+bp

ap+1/1-bp

1+ap/1-bp

a(1+bp)

Which metal burns in air at high temperature with the evolution of much heat.

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Cu

Hg

Pb

Al

Each of the following when present at para position decreases the acidic strength of phenol except.

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-NH2

-Cl

CH3O-

CH3-

If diesel has cetane number of 50 then the diesel index will be.

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36

46

56

66

Which of the following statement is not correct regarding Lewis acids and bases.

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NH3 and H2O both behaves as Lewis bases

Substances which donate a pair of electrons are called Lewis bases

All Lewis bases are also Bronsted bases

Lewis base must contain an atom having less than an octet of electron.

Poise is a unit of.

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Refractive index

Optical activity

Fluidity

Viscosity

Which of the following will have the largest pH?

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O.1 N HCl

0.1 N CH3COOH

0.1 N NaOH

0.01 N NaOH

Process of separating the racemic mixture into optically active isomers is known as.

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Resolution

Racemisation

Walden inversion

Epimerization

Which of the following property of liquids concern with the interval resistance to its flow.

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Refractive inded

Viscosity

Optical activity

Dipole moment

The noble gases are used due to having property

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Chomical inertness

Low boiling point

Any of a or b

Both a and b

Hydrogen bons holding the strand to nucleic acids are formed between

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Sugar and base units

Base unit

Sugar ane phosphate units

Sugar units

The size of iso electronic species - F- , Ne, and Na+ is affected by

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Nuclear charge (Z)

Valence principal quantum number (n)

Electron electron interaction in the outer orbital

None of the factors because their size to the same.

The value of Kw increase with temperature because the ionization of water.

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Positive

Negative

Endothermic

Exothermic

Which one of the following statements is not true.

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Transition metals form alloys

Transition metals form complexes

Zn, Cd and Hg are transition metals

K2[PtCl6] is a well known compound but corresponding nikel compound is not knonwn

Which of the following molecule does not contain the covalent bond between similar atoms.

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N2H4

F2O2

H2F2

H2O2

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

For a given mass of a gas if temperature increase

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Pressure and volume remain Constance

Volume increases provided pressure is kept constant

Pressure decreases provided volume is constant

Both volume and pressure decrease

Glycine reacts with nitrous acid to form

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Methyl amino

Acetic acid

Zwitter ion

Glycollic acid

The smallest cluster of carbon atoms in Bucky balls known till today consists of ___________ carbon atoms.

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75

20

60

15

A molecule returns from the excited singlet state to the ground singlet state with emission of light This process is known as

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Fluorescene

Scattering

Phosphorescence

Chemiluminescence

Which of the following compounds does not show dipole moment.

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CH3OH

HBr

CCl4

CHCl3

The noble gases which does not I do not form any clathrates is.

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He

Ne

Argpm

Both He and Ne

The first noble gas compound was

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XeO3

XeF4

XeF6

Xe +[PtF6]

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