Question # 1

Which ionization Potential in the following equations involves the greatest amount of energy.

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Na = Na+ + e

K = K+ +e

C2+ = C3+ +e

Ca+ = Ca2+ + e

An example of acyclic monotterpenoid is

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a -pinene

Camphor

Geranial

Citral

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

The formation of daughter DNA's from parent DNA is called.

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Transalation

Transcription

Reproduction

Replication

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

In normal mode of operations of liquid liquid partition, a polar stationary phase is used with a non polar mobile phase Which of the following solvent is used as mobile phase.

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Ethanol

Propanol

Butanol

Hexane

Co ordinate covalent bond found is formed by the

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Transference of electrons

Sharing of electrons

Donation of electrons

None of these

Which of following is used as make up chemical in Kraft process.

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Na2CO3

KCl

Na2SO4

NaOH

The number of significant figures in the number 0.216 is

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1

2

3

4

Which of the following radical is not a member of IV group.

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Mg²⁺

Co²⁺

Ni²⁺

Mn²⁺

The increase in boiling points of noble gases from He to Xe is due to the

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Decreases in ionization energy

Increases in polarizability

Increase in electron affinity

Increase in atomic volume

The solution of the transition metal complexes having one or more unpaired electrons in the d-orbital are.

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Coloured

Colourless

White

None of above

A combination of atomic orbitals produces a large number of closely special energy states brown as.

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Packet of energy

Band of energy

Botha a and b

None of the above

The process of transfer of genetic message from DNA to m-RNA is known as

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Refplication

Translation

Transcription

Transference

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

Which of the following polymers is chlorinated.

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Orlon

Neoprene

Dacron

None of these

Ground state electronic configuration of valence shell in N2 m lecule is written as (a2s)2, (o*2s)2 , (pi sp)4, (o2p)2, Hence, the bond order of N2 molecule is.

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1

2

3

0

Of the following an amphoteric hydroxide is.

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Ca(OH)2

NaOH

Be (OH)2

Li OH

Which of the following technique is useful to remove metal ions from an interfering matrix.

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Solvent extraction

Electrophorests

Cataphorests

Gel permeation

The correct order of ionization energies of alkali metals is.

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Li > Na > K > Rb

Na > K > Rb > Li

Rb > K > Na > Li

Rb > K > Li > Na

Who prepared and explained nano tubes for the first time.

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Sumio Tijima

Richard Smaley

Erick Drexler

Richard Feynamann

A catalyst increases the rate of a reaction because.

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It provides the necessary energy to the colliding molecules to cross energy barrier

It decreases the heat of the reaction

It decreases the order of the reaction

It provides a different path of lower activation energy.

Which of the following process always involve the decrease in oxidation number.

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Hydrolysis

Elecomposition

Oxidation

Reduction

Atomicity of which of the following pair of elements is not same as hydrogen.

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Phosphorus, Nitrogen

Nitrogen, Argon

Nitrogen, iodine

Iodine, sulphur

Which of the following iso -electronic ion would require least energy for the removal of electron.

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Ca2+

Cl-

Ar-

K+

The atomic orbitals are progressively filled in order of increasing energy. This statement is called as

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Hund's rule

Aufbau's rule

(n+1) rule

Planck's rule

Pick out incorrect statement.

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NF3 molecule has trigonal pyramidal structure.

It is practically incoluble in water and is only hydrolyzed, an electric spark is passed through a mixture with water vapour.

Dipole moment of NF3 is more than that of NH3

Nitrogn (III) oxide (N2O3) is an acidic oxide.

In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is

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In catalytic amount

One equivalent

More then one equivalent

Amount does not matter

Electronegativity of Oygen is.

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2.5

3.5

2.4

2.1

Peppermint oil contains.

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Menthol

Thymol

a-pinene

Comphene

In group 17, the element with highest first ionization enthalpy belongs to.

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Period 1

Period 2

Period 7

Period 6

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