Question # 1

The absorbance is directly proportional to the path length in the flame and to the concentration of atomic vapor in flame is a statement of.

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Lambert's law

Beer's law

Honery's law

Starke law

Which of the following has the highest melting point.

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NaCl

KCl

MgO

BaO

Which of the following colligative properties can be used to characterize colloidal particles.

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Lowering in vapour pressure

Elevation in boiling point

Depression in freezing point

Osmotic pressure

A molecule the cannot be susperimposed on its mirror image is said to exhibit which of the following.

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Geometrical isomerism

Optical isomerism

Linkage isomerism

Reactive isomerism

At the some temperature 0.1 M solution of urea is isotonic with.

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0.1 M glucose solution

0.1 M NaCl solution

0.1 M urea solution

0.1 M BaCl2 solution

Which of the following extractant is used to solid phase extraction

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Bonding of C18 chains on silica

Bonding of C20 on paper

Bonding of C18 on glass

Bonding of C20 on cellulose

Pyrolysis gasoline is obtained from.

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Catalytic cracking

Gasification

Steam cracking

Reforming

Which of the following does not represent Lewis acid.

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ZnCl2

FeCl2

BF3

Bul4

Which of the following are anionic detergents.

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Sodium salts of sulfonated long chain alcohol

Ester of stearic acid and polythlene glycol

Quaternary ammonium salt of amine with acetate ion

Sodium salts of sulfonated long chain hydrocarbons

Oxidative enzymes are responsible for

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Biological processes

Biological oxidation

Biological hydrolysis

Biological isomerisation

Which of the following substance act as photochemical oxidant

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Ozone

NOx

peroxyacetyl nitrate

All above

The rotation of plane polarized light when it posses through 1 dm of a solution containing 1 gram of the substance per cm3 of the solution is called.

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Molar rotation

Molar refraction

Specific refraction

Specific rotation

Which pair of species can undergo chemical reaction with each other.

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CO+ NO

LiH and H2O

CO2 and HCl

CaH2 and SI H4

Which substance is used as filler or additive in paper making.

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Starch

Glucose

Cellulose

Maltose

The number of electrons involved in bonding in Lewis structure of oxalate ion is

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20

14

22

18

If diesel has cetane number of 50 then the diesel index will be.

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36

46

56

66

Hot isostatic pressing is not a viable option if the chief criterion is

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Strength without gram growth

Lost cost

Zero porosity

Make it hard

In smelting process the ore is mixed with

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Silica

Coke

Limestone

All

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 electrolytic method super passes all other methods due to.

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Furity

Cheapness

Easy available

All above

Which of the following statement represent disadvantages of sanitary landfill

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Public opposition

Uneconomical

Health hazard

All above

The silicate chains are present in

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Silica

asbestos

Beryl

Clays

Which of the following is not a colligative property.

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Elevation of B.P.

Depresaion in F.P

Viscosity

Osmotic pressure

The variable valency is generally observed in case of.

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Transition elements

Inert gases

Normal elements

Non- metallic elements

Which of the following is not an alkali metal

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Rb

Sb

Cs

Fr

In the long form of periodic table, elements are arranged according to.

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Increasing atomic number

Decreasing atomic number

Increasing atomic mass

Decreasing atomic mass

In their ionic compounds halogens exhinit the oxidation states of.

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-1

-2

-3

-4

Fluorine is.

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Powerful oxidizing agent

Most reactive element

Used as refrigerants

All of above

Which is the correct order of wave number of the following redistions.

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X-rays > uv > Infrared > visible> radio waves

X-rays > uv > visible > Infrared > radio waves

X-rays > radio waves > uv > visible > Infrared

X-rays > Infrared > uv> visible > radio waves

The IUPAC name of HCOOCH3 is.

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Methoxy methanol

Ethanoic acid

Methyl methanoate

Methoxy methane

Which of the following is the statement of third law of thermodynamics.

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Entroy of perfectly crystalline substance is zero at T = 0

Entropy of a perfectly crystaline substance is zero at standard state conditions

Entropy and enthalpy of a substance become equal at T = 0

Free energy of a crystalline substance is zero at T = 0

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