Question # 1

Which pair of molecules have debye force

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Ne and Ne

Argon and water

Na⁺ion and water

Water and water

Which is property of CO?

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Soluble in water

Insoluble in water

No toxic

Pole coloured

AgNO₃ is a polymorphic having two different crystalline forms which are

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cubic, tetragonal

monoclinic, hexagonal

cubic, orthorhombic

orthorhombic, rhombohedral

The order of reactivitv of alksI halides towards nucleophile is

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RI>RBr RF>RCI

RF>RCI>RBr>RI

RI>RBr> RCI>RE

RF>RBr>RCI>RI

The species which are produced by heterolytic bond breaking and can act as electron pair donor

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Free radicals

Cations

Nucleophiles

electrophile

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

Lysine

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Basic Only ketogenic

Ketogenic glucogenic

Acidic glucogenic

Non essential

Elements of II-A group are called alkaline earth metals due to the reason that

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they occur in earth only

they form divalent cations only

they have ns2 electronic configuration

their oxides and hydroxides are alkaline in nature and metals are present in earth crust

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

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2 days

5 days

6 days

7 days

Carboxylic acid can be prepared from:

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Hydrolysis of alkyl nitrites

Reaction of CO₂with Gringard's reagent

Hydrolysis of esters

All of these

Vegetable oils are

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Unsaturated fatty acids

Glycosides of unsaturated fatty acids

Glycosides of saturated fatty acids

None

Formic Acid is obtained from Red out by:

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Distillation

Crystallization

Filtration

sublimation

The substance upon which an enzyme acts is known as its

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Domain

Field

Substrate

Reactant

N-atom forms three covalent bonds, its electronic configuration is

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Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

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Be > Mg> Ca > Ba

Ba > Ca > Mg > Be

Ca > Mg > Be > Ba

Ba > Mg > Ca > Be

Which is litharge or massicot?

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PbO

Pb₂O

Pb₃O₄

PbO₂

The hydroxyl derivatives of aromatic hydrocarbons which have the -OH group directly bonded to the ring C-atom are called

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Alcohols

Ketones

Esters

Phenols

The atomic radius increases as we move down a group because

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Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

The theory of chemical bonding has been a major problem of:

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Modern Physics.

Modern Chemistry.

Modern Biology.

Mechanics.

Identification of a substance, determination of its structure and quantitative analysis of its composition are the aspects covered by

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Modern analytical physics

Mechanical chemistry

Biochemistry

Modern analytical chemistry

Bakelite is obtained from phenol by reacting with

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Acetaldehyde

Acetal

Formaldehyde

Chlorobenzene

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

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2

1

3

4

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