Question # 1

The total number of orbitals in a shell with principal quantum number 'n' is

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2n

2n²

n²

n + 1

Dipole moment of CO molecule is:

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0.0

1.112 D

0.112 D

2.112 D

Which of these polymers is a synthetic polymer?

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Animal fat

Starch

Cellulose

Polyester

Chromic acid used to oxidize

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Aldehyde

Ketone

Both a and b

None of these

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

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Ca

Na

Mg

Zn

E₁mechanism is generally shown by

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1° - RX

2° - RX

3° - RX

None of these

Which of the following form normal oxide

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K

Li

Na

None

The sample being analyzed is called :

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Electrolyte.

Substance.

Analyte.

All of above.

Which on of the following compounds does not exist?

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NCl₅

AsF₅

SbCl₅

PF₅

In a period, melting points of elements

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Increases

Decreases

Remain constant

First increases then decreases

The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called

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Isomerization

polymerization

Hybridization

Resonance

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

The elimination of HX from adjacent carbon atoms is called

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Halogenations

Hydrohalogenation

Dehydrohalogenation

Hydration

Mass of simple electron is:

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9.1 x 10^-31 kg

9.1 x 10^-30 kg

1.66 x 10^-31 kg

9.1 x 10^-31 kg

For which system does the equilibrium constant, kc has units of (concentration) ?

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N₂+3H_2-------2NH₃

H₂+L₂---------2HL

2NO₂----------N₂O₄

2HF--------H2+F₂

Sintered glass is a porous material use for :

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Absorpton

Decoration.

Filtration.

All of above.

Which one gives acidic reactions?

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CH₃----C≡C-------CH₃

CH₃-----CH₂-----HC=CH----CH₂

CH₃----CH=CH₂

CH₃-----C≡CH

The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the

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Orientation of orbital in space

Fact that two electrons in the same orbital should have opposite spins

Energy of the orbital

Spin of the electron

Which reaction produces a free radical

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SN reaction

Homelytic fission reaction

Heterolytic fission reaction

Addition reaction

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

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100

200

One

Zero

The open chain compounds are also called

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Aliphatic

Alicylic

Aromatic

Both a and b

The rate of E₁reaction depends upon:

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The concentration of substrate

The concentration of nucleophile

The concentration of substrate as well as nucleophile

None of these

The value of Plank's constant 'h' is

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6.625 x 10^-34

6.625 x 10^-34J sec

6.625 x 10^-34KJ

6.625 x 10^-34K Cal

The solution of which acid is use for seasoning of food?

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Formic acid

Acetic acid

Benzoin acid

Butanoic acid

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

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1

4

9

12

The human body can synthesize ______ amino acids

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1

10

20

19

Which is liquid among the following alkenes?

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Ethane

Propene

Butene

Pentene

The amount of energy required to remove an electron from an atom of an element in the gaseous state is called

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Electron affinity

Electronegatively

Ionization energy

None of these

Plastics are pollution problem because many plastics:

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Are made from petroleleum

Are very inflammable

Burn to produce toxic funes

Decompose to produce toxic products

Which statement in not correct about alcohol?

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Ethyl alcohol is heavier than water

Ethyl alcohol ecaporates more quickly

Alcohol with less number of carbon atoms is more soluble in water than alcohol with more number of carbons atoms

Alcohol produces H₂by reaction with sodium metal

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma and two P_i

One sigma and three P_i

sigma

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