Question # 1

The light absorbed in UV and visible region causes.

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Vibrational energy changes

Rotational energy changes

Electronic excitation

All of these

In Nano synthesis new unsual chemical reactions are due to.

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Non equilibrium system

Equilibrium system

Isothermal system

Adiabatic process

Rectified spirit obtained by formentation contains 5% of water .So in order to remove it, rectified spirit is mixed with suitable quantity of benzene and heated Benzene helps because.

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It is dehydreating agent and so removes water

It forms the loweer layer which retains all the water so that alcohol can be distilled off

It form an azeotropic mixture having high boiling point and thus allows the alcohol to distall over

It forms low boiling azeotropic mixture which distille over leaving behind pure alcohol which can than be distilled.

The expected specific wastes of textile industry is

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Cloth residue

Fibre residue

Dyes

All above

The element having highest ionization energy and least electron affinity belong to

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Period 1 , group 18

Period 2, group 17

Period 2, group 1

Period 2, group 2

Which of the following would decompose at lowest temperature.

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MgCO3

SrCO3

BaCO3

CaCO3

Which cast iron is hard and wear resistant.

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Grey iron

White iron

Melleable iron

None of these

Which of the following is an important aspect of industrial ecology.

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Minimising air emissions

Minimising liquid waste

Recycling after use

All above

Which of the following elements is most electropositive.

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C

N

O

Be

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

Lother Meyer plotted a graph showing variation of.

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Atomic volume with increase in atomic number

Atomic volume with increase in atomic weight

Atomic redii with increase in atomic weight.

Atomic weight which increase in atomic number

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

Most effective pesticide is

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Carbonates

Organophosphates

Organ chlorines

All of these

The state of hybridization of Xe in Xe F6 are

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sp2

sp3

sp3 d

dsp3

Aque regia is made by dissolving a mixture of HNO3 and HCl with ratio.

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1 : 1

1 : 3

1 : 2

1 :10

Which of the following statement is not correct with respect to hydrolytic cycle.

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It is the major constituent of the lithosphere

it is essential requirement of all the organisms

Water covers about 83% of the earth's surface

Water covers about 73% of the ear5th's surface.

Which of the following does not belong in the group of herocyclic dyes.

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Acridine

Cyanine

Methylene blue

Amido black

Ozone layer of upper atmosphere is being destroyed by

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chlorofluorocarbons

SO2

Photochemical oxidants O2 and CO2

Smog

Which is true for DDT it is.

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Not a pollutant

An antibiotic

A non degradable pollutant

A pesticide

Copper is resistant to

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Air

Water

Acid and Alkali

All of the above

The pKa of an acid having ionization constant 1 x 10^-5 is

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-5

5

9

-9

The electronic configuration of chromium is 4s1, 3d5, The elements tungsten (W) belongs to the same group and has atomic number 74.The configuration of its valence shell is.

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5s1, 4d5

6s1, 5d5

6s1, 5d6

6s1, 5d4

Which of the following carbonates decomposes at the highest temperature.

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Mg CO3

CaCO3

Sr CO3

Ba CO3

CFSE for d⁷ ion is.

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0.8

-0.8

-1.8

1.8

What is the most common alloying ingredient in copper?

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Brass

Zinc

Cobalt

Nickle

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 of the following has the highest melting poing.

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NaCl

Li Cl

KCl

Rb Cl

Form electron deficient compounds

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B

AI

Both B and AI

None of above

The normality of 2.3 M H2SO4 solution is.

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0.46 N

0.23 N

2.3 N

4.6 N

All the member of group III A are metals except.

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B

Ai

Ga

In

Which of the following are neutral ligands.

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NH3

H2O

CO & NO

All of above

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