Question # 1

The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are.

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2,2

3 , 2

1 , 1

1 , 2

Which of the following chemical strong oxidizing agent is used in COD test.

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KMnO4

H2SO4

CH3COOH

K2Cr2O7

Which of the following salt is green in colour

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Mn salt

Cr salt

Co salt

Ba salt

Which among the following is insoluble in water.

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LiOH

KOH

NaOH

RbOH

Which of the following statement is not correct with respect to hardness of water.

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It is due to soluble salts of Na

it is due to soluble salts of Ca

It is due to soluble salts of Mg

It is due to soluble salts of Fe

The hardest material found in nature is

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Steel

Topaz

Diamond

Quartz

The formula of sulphur sequioxide

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SO4

S2O7

S2O3

SO3

Hydrogen bond is not electrostatic in nature is stated by

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Electrostatic approach

Valence bond approach

Molecular orbital approach

None of the abvoe

The experimental relationship between rate of the reaction and concentration of the reactants is called.

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Rate law

Law of mass action

Le-Chatelier's principle

Rate constant

The word 'ceramic' meant for.

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Soft material

Hard material

Burnt material

Dry material

Which of the following materials is not suitable as adsorbent for chromatography.

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Silica gel

Activated charocal

Alumina

Calciu7m chloride

Which of the following is not related to crystallography .

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Law of rational indices

Law of anymmetry

Law of constancy of interfacial angel

Henry's law

The Langmuir theory of unimolecular adsorption is generally valid at.

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Low pressures and low temperature

Low pressures and high temperature

High pressures and low temperature

High pressure and high temperature

The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of.

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Law of dynamic equilibrium

Le Chatlier's principle

Law of mass action

Solubility product principle

In each period the most electro negative element belongs to.

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^{Group -1}

Group -17

Group -2

Group -18

Which of the following impurities are present with the bauxite.

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Silica

Ferric oxide

Alumina

Both silica and ferric oxide

The Schrodinger equation when solved for any system gives.

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The mean force path

The Polarizability

The energy function

The wave function

Which group contains elements that exist as monoatomic molecules.

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1

2

14

18

The stationary and mobile phases in paper chromatography are.

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^{Liquid/Liquid}

Solid /Liquid

Liquid/Solid

Gas/solid

Which of the following phenomena is not explained by the classical mechanics.

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Black body radiation

Photoelectric effect

Atomic and molecular spectra

Heat capacities of solids

All of the above

What is the purpose of molybdenum in steel alloying.

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To increase dynamic and high temperature strength and hardness

To increase brittleness

To increase corrosion and resistance

All above

The emission of light in a biological reaction is known as

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Fluorescence

Phosphorescence

Bioluminescence

Photolysia

How many varieties of commercial iron are known.

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1

2

4

3

Which of the following statement is not correct with respect to group theory.

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Two elements of a group combine to form a third element of a group

An element combines with itself to form another element of the group.

Each element of the group obey associative law of combination

Each group element has no reciprocal

When metal orbital are rotated in octahedral field the following representation obtained.

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t2 g + lg

a1 g

t 1 u

All above

Sodium reacts with excess of oxygen to form

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Na2O

NaO2

Na2O2

NaO

Strong field ligands such as CN

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Usually produce high spin complexes and small crystal field splitting

Usually produce low spin complexes and small crystal field splitting

Usually produce low spin complexes and high crystal field splitting

Cannot form low spin complexes

Flourine differs from the other members of its own group due to.

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Its small size and low bond energy

Its higher electornegativity

None-availability of d-orbitals in its valence shell

All the above

The rate constant of a reaction depends on

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Concentration of reactants

Concentration of products

Temperature

Time

What is the colour of pulp obtained from chemical pulping.

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Black

Brown

Blue

Red

The electromagevitiy of the following elements increase in the order

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F > Cl > O > S

S > Cl > O > F

F > O > N > C

C > O > N > F

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