Question # 1

The equation which relates the reaction rates and equilibrium constants of many reactions is known as.

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Taft equation

Hammett equation

Differential equation

Linear equation

For assciated liquids, the value of d/M n x 10⁸ should be (where d is the density, M is the molar mass and n is the coefficient of viscosity)

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Zero

Infinte

Higher than 70

Less than 70

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Pick out incorrect statemtn about K2r2O7

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It oxidizes acidified solution of H2S to S

It oxidizes Ki TO i2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Among oxides of nitrogen all are gases except.

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N2O5

N2O

NO

N2O3

Which of the following is not related to the limitations of Bohr's model.

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It does not applicable to more than one electron system.

It does not explain the extra lines obtained in the H-spectrum

It considers the electron as particle

It considers the electron as a wave.

Photochemical among is related to pollution of

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Air

Water

Soil

All of the above

Which of the following system has low as well as upper consolute temperature.

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Nicotine - water

Aniline -water

Triethlylamine -water

Phenol -water

Which of the following statements is not correct regarding the structure of DNA.

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It has a double helix structure.

There are hydrogen bonds in its structure

Unlike RNA there is no fixed ratio of bases in DNA

The code for protein synthesis is given by the sequence of bases in DNA

Process of separating the racemic mixture into optically active isomers is known as.

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Resolution

Racemisation

Walden inversion

Epimerization

The correct order of electron affinities is.

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C > Si, > Na > Ar

Si > Cl > Na > Ar

C > Na > Si > Ar

C > Si > Ar > Na

The different layers in graphite are held together by

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Ionic bonding

Metallic bonding

Covalent bonding

Van der Waals forces

The suffix "ate" at the end of the name of the compiled signifies that it is.

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Cation

Anion

Neutral

None of above

The electrolysis of molten metal hydride will produce dihydrogen gas.

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At cathode

At anode

At both the electrodes

At none of the electrodes

Pick out the incorrect statement for Xe F6

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XeF6 is hydrolyzed practically to form XeOF4

It reacts with SiO2 to form Xe F4

On complete hydrolysis, it forms XeO3

It acts as F acceptor when treated with alkali metal fluoride, but cannot act as F donor to form complexes.

Glass obtained by placing a layer of butyral plastic with a suitable adhesive between two layers of glass and cementing them by heat and pressure is called.

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Glass wool

Safety glass

Optical glass

Jena glass

Vitamin which contains cobalt is.

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Vitamin B1

Vitamin B2

Vitamin B6

Vitamin B12

Borax exist in the form

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Ordinary borax

Octahdral borax

Borax glass

All above

Which one of the following statement is incorrect in relation to ionization enthalpy.

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Ionization enthalpy increase for each successive electron

The greatest increase in ionization enthaly is experienced on removal of electron from core noble gas configuration

End of the valence electron is marked by a big jump in ionization enthalpy

Removal of electron from orbitals bearing lower value to easier than from orbital having highest n value.

During the preparation of ethane by Kolbe's electrolytic method using inert electrodes the pH of the electrolyte.

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Increases progressively as the reaction proceeds

Decreases progressively as the reaction proceeds

Remains constant throughout the reaction

May decrease if the concentration of the electrolyte is not very high

A major constituent of materials one whose amount in the materials is

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1% or more

0.1%

0.01%

0.001 %

The pH of 0.001 N HCl is

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1

2

3

4

The main constituents of ___________ are boron oxide and silica.

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Pyrex glass

Low silica glass

Soda lime glass

Super hard glass

Which of the following statement is not true regarding Open Hearth process.

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No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

Variable electrovalency is due to the following reasons.

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Unstable configuration of core

Inset electron pair effect

All of above

None of above

Which among the following is least soluble in water.

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NaF

LiF

KF

CsF

Which of the following statements is wrong.

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Covenant compounds are generally soluble is polar solvents.

Covalent compounds have low melting and boiling points

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H

A theoretical link between quantum mechanics and thermodynamic is.

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Electrochemistry

Kinetic theory of gases

Spectroscopic analysis

Statistical thermodynamics

Which of the following agrochemical acts as pollutant.

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Fertilizers

Weedicides

Herbicides

All above

During reaction of copper with aqueous solution of silver nitrate

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Silver atoms are reduced

Cu2+ ions are reduced

Silver ions are reduced

No³ ions are reduced

According to R, S system the correct order of priority of the following groups is .

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-CH2OH > - CHO > ----- COOH

-COOH > ------CHO > ------CH2OH

---- CH2OH -----> - COOH > -------CHO

--- COOH > - CH2OH >----- CHO

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