Question # 1

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

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Urea

Thiourea

Cholic acid

All above

A terpenoid which as an alcoholic group in the molecule is

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Citral

Camphor

Menthol

Carvone

In each period the element with lest electron affinity belongs to.

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Group 1

Group 14

Group 17

Group 18

Buffer solution are used to.

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Increase the pH

Resist the pH

Decrease the pH

None of above

Potassium sulphate with 48% to 52% potash, is made from.

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Potassium phosphate

Potassium Chloride

Potassium Nitrate

None of these

Nano particles may interact with the support to be.

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Partially oxidized

Partically reduced

Both a and b

None

Which of the following salt is green in colour

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Mn salt

Cr salt

Co salt

Ba salt

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

Acid rain is caused due to increase in the concentration of _______ in the atmosphere

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Ozone and dust

CO2 and CO

SO3 and CO

SO2 and NO2

Which type of the coal preferred for metallurgical coal.

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Lignite

Peat

Bituminous coal

None of these

Which of the following will be most effective int he coagulntion of

Fe (OH)3 sol.

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NaCl

MgSO4

AlCl3

Mg3 (PO4)2

Law of octaves was proposed by

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Lother meyer

D.I.Mendeleev

J.A.R. Newlands

J.W. Dobereiner

Homolytic fission of convalent bond results in the formation of.

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Free redicals

Carbocations

Carbonions

Both B and C

Conductometry is based on

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Electric current

Electrical potential

Absorbance

Electrical conductance

Aluminium halides is.

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White crystalline solid

Hygroscopic

Sublimes at 180^oC

All above

Non localised bonds are referred as

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Metallic bond

Long range bonds

Ionic bond

Covalent bonds

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.

Is a peroxy acid

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H2SO5

H2S2O6

H2SO4

H2S2O7

In compressive strength of a nanotube ______ its tensile strength.

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I less than

Is greater than

Is equal to

Less than or equal to.

Which of the following elements has the highest ionization energy.

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Na

Si

Ar

Cl

The following alloys are the chief alloys that are die cast except.

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Zinc alloys

Magnesium alloys

Manganese alloys

Nickel alloys

Which of the following detector is used for compounds containing electronegative atoms.

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Mass specdtrometer

ECD

TCD

UV-detector

Which of the following has the highest lattice energy

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LiCl

NaCl

KCl

CaCl

Which of the following interaction is involved in solid phase extraction technique.

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Van der Waals forces

Dipolar attraction

H bonding

All of above

Organic substance responsible for the smell of the Flowers etc are grouped together in chemistry as.

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Perfumes

Terphenoids

Flavonoids

Alkaloids

Silicon bronze contains how many percent of silicon.

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96%

3%

1 %

69 %

Dry ice is

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Solid CO

Solid CO2

Solid NH3

Solid SO2

Lactic acid is a molecule which shows

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Epimersim

Tautomerism

Opical isomerism

Metamerism

While compacting the concrete by a mechanical vibrator, the slump should not exceed.

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2.5 cm

10 cm

3.1 cm

5.0 cm

In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up in.

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Slag

Gangue

Metallic calcium

Calcium carbonate

Chlorine when attached to benzene has

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+1 and + R effect

-1 and - R effect

-1 and +R effect

None of the above

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