Question # 1

When CH3COOH is titrated against NaOH the pH as the equivalence point is.

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7

> 7

o

>7

6.8

In a one -component system the maximum number of phase that can consist in equilibrium is.

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1

2

3

4

The product obtained on heating n-heptane with Cr2O3 ____Al2O3 at 600 ^oC is.

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Cycloheptane

Methyl cyclohexane

Benzene

Teluene

In propagation step the reaction intermediate of radical polymerization is

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Carbocation

Carbonion

Free radical

Carbene

Which of the following is the second anciently known metal.

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Nickel

Copper

Gold

Silver

Which of the following method of analysis is based on diffraction of radiation.

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Mass spectrometry

Polarography

Potentiometry

Raman scattering

In an adiabatic system, if work in done, the temperature must.

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Increase

Decrease

Remain the same

Increase than decrease

The separation efficiency of a column can be expressed in terms of number of.

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Solvents used

Theoretical plates

Stationary phases

Mobile phases

Xe reacts directly with

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O2

Cl2

F2

Br2

The law of trinds was proposed by

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Dobereiner

Newlands

Lother Mayer

Chancourtois

The phase rule was deduced by

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Gibbs

Thomson

Troution

Henry

Which of the following compounds combines with hemoglobin.

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CO2

CO

NO

N2

Casionic polymerization is initiated by

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BF3

NaNH2

Bul

Both b and c

Increased asthmatic attacks in certain seasons are related to.

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Inhalation of seasonal pollens

Eating of seasonal vegetables

Low temperature

Wet and dry environment

Zero group elements are called as

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Inert gases

Rare gases

Noble gases

All of above

Which of the following statement is not true in case of catalytic reforming.

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High temperature results in loss of reformate yield

High naphthenic stock require high space velocity

Presence of water decrease the hydrocracking activity.

None of above

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 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

Peeling of ozone umbrella is due to.

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CFCa

PAN

CO2

Coal burning

The formula of copper pyrite is.

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CuFeS

CuFeS2

Cu2FEs

Cu Fe2S

A half cell reaction is one that

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Occurs at one electrode

Goes only half way to completion

Involves a half mole of the concentration of the solution

Always oxidizes

The unit of nucleic acid having base sugar combination is called.

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Nucliec acid

Nucleoside

Nucleotide

None of these

Strongest inter molecular hydrogen bond is formed in

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H2O

NH3

HF

H2S

Which sequence of steps is correct in paper making machine

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Pressing Dyring, Flow spreader Calender stock

Flow spreader, Pressing, Prying Calender sock

Drying ,Pressing , Flow spreader, Calender stock

None of above

Urea an enzyme used to estimate urea is a

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Hydrolytic enzyme

Oxidative enzyme

Reductive enzyme

Iso me rising enzyme

If a chemical reaction in equilibrium is subjected to a change the reaction tends to more in such a direction that the effect of the change would be neutralized This is a statement of.

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Law of mass action

Le Chatlier's principle

Henery's law

Correspondence principle

Which of the following has the maximum tendency to form complexes.

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K

Na

Rb

Li

Cement containing higher percentage of gypsum than required.

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Sets slowly

Sets repidly

_{Does not set at all}

Has no effect

Thermocouples have been constructed from

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Chromel ve elumel

Copper vs platinum

Both

None

Al Cl3 is used in

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Manufacturing of petrol

In borax bead test

Prezervation of food

All above

Indigotin is a dye obtained from indigo plant which belongs to the group of.

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Substantive dyes

Mordant dyes

Vat dyes

Disperse dyes

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