Question # 1

Which one has a co ordinate bond.

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Al2Cl6

BF3

NaCl

O2

H2SO4 is manufactured by

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The lead chamber process

The contact process

Both A and B

The Ostwald's process

NH4OH in the presence of H2S is used as a group reagent for which of the following group.

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Group I

Group II

Group III

Group IV

Which of the following is a thermometric method.

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TGA

DTA

DTG

All

Water pollution is due to

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Agricultural discharges

Swages and other wastes

Industrial effects

All the above

Dyes used in photographic plates to make them panchromatic is.

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Cyanine dyes

Azine dyes

Phthalocyanine dyes

Acridine dyes

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

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Urea

Thiourea

Cholic acid

All above

The electrical resistance of stainless steels can be as much as______ time that of carbon steel.

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5

6

10-

15

The substance that can form the glassy non-crystalline structure is called.

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Stabilizers

Fluxes or modifiers

Formers

None of these

The rate constant of a reaction depends on

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Concentration of reactants

Concentration of products

Temperature

Time

Anything that influence the valence electrons will affect the chemistry of the element Which of the following factors does not affect the valency shell.

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Valence principle quantum number in

Nuclear charge (Z)

Nuclear mass

Number of core electrons

A closed system is one which can exchange with surrounding.

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Matter but not energy

Energy but not matter

Both matter and energy

Neither matter nor energy

Boric acid is added to glass because is.

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Makes the glass opalescent

Reduces the coefficient of expansion

Makes the glass brittle

Increase refractive index of the glass.

Which of the following statements is not related with entropy.

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It is a measure of disorder

It is a measure of unavailable energy

It is a function of thermodynamics probability

It is a path function

Aluminium halides is.

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White crystalline solid

Hygroscopic

Sublimes at 180^oC

All above

Dull red flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

The use of acids to remove oxides and acids on hot worked steels is known as

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Tempering

Picking

Machining

Sizing

The fertilizers which provide single nutrient from NPK are called _______ fertilizer

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Straight

compound

Both A and b

None of above

Which of the following statement is not correct with respect to limitations of Hammett equation.

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It is only applicable to aromatic systems

Only applicable to aliphatic systems

It is not valid for m-substituent

Which of the following substance is not weak electrolyte.

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CH3COOH

NH4OH

Oxalic Acid

NaCl

The emission of light in a biological reaction in known as.

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Fluorencence

Phosphoreacence

Biolumineacence

Phtolysis

Which of the following statement is not related to collision theory.

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Molecules must collide with each other to do a chemical reaction

Molecules must posses a minimum amount of energy

Molecules must have proper orientation

Collision theory is applicable to liquid only.

Which is the following is not a buffer.

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H2CO3/HCO3

NH4Cl/NH4OH

CH3COOH/CH3COONa

NH3OH/CH3COOH

The equilibrium constant value for a chemical reaction is 5 x 10²⁰which of the following statement is true with respect to this value.

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Reaction will be reversible

Reaction will proceed in backward direction

Reaction is at equilibrium

Reaction will proceed in the forward direction

'A line, a point or a plane about which a symmetry operation is performed, is known as.

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Symmetry operation

Symmetry element

Reflection

Inversion

The link between classical thermodynamics and quantum mechanics is prevented by

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Statiatical mechanics

Boltzmann law

Wave mechanics

Matrix mechanics

Oxygen and sulphur exist in state

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Free

Combined

_{Both free & combined}

None of above

The titration involving oxidation reduction reactions is called.

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Complex titration

Simplex titration

Redox titration

Acid base titration

Which one of the following pairs are chemically dissimilar.

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Na and K

Ba and Sr

Zr and HF

Ca and Zn

The formula of Borax is.

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Na2B4O7 6H2O

Na2B4O7 8H2O

Na2B4O7 10H2O

Na2B4O7 12H2O

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