Question # 1

Electron affinities of halogens are in the order.

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F > Cl > Br > I

Cl > F > Br > I

Cl > Br > I > F

Cl > Br > F > I

Vitamin D1 is chemically known as

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Ergocalciferol

Tocopherol

Aserphthol

Phylloquinone

Which of the following quantity is correct for micro analysis.

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1 -10 mg or < 50 ml

10-20 mg or > 50 mL

50-100 mg or < 100 mL

None of above

Which one of the following is not correct.

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Ar is used in electric bulbs

Kr is obtained during radioactive decay

Boiling point of H2 is lowest among all noble gases.

Xe forms Xe OF4

The emission of light in a biological reaction is known as

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Fluorescence

Phosphorescence

Bioluminescence

Photolysia

A molecule MX4 has a square planar shape, The number of non bonding pairs of electrons around M is .

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2

1

0

3

Peeling of ozone umbrella is due to.

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CFCa

PAN

CO2

Coal burning

Pick out the incorrect statement for transition metals.

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Cu+ is not a transition metal ion

Transition metals do not exhibit variable oxidation states

Transition metal ions are coloured

Transition metals and majority of their compounds are paramagnetic

The formula of sulphur sesquioxide

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SO4

S2O7

S2O3

SO3

C is -2 butene on reaction with bromino give 2,3 -dibromobutane which is

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Recemic mixture

Meso isomer

Dextoroisomer

Levoisomer

Which of the following is homopolymer.

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Starch

Plexiglas

Orlon

All of these

What is a measure of rigidity?

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Stiffiness

Jardmess

Strength

Modulus of elasticity

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

Which of the following fuel is used in flame photometry.

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Hydrogen gas

Acetylene gas

Methane

Propane

All above

When fullerencs were discovered they were thought to be

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First example of spherical aromatic molecule

First example of spherical non aromatic molecule

First example of diamond lime molecule

None of the above

The polarity of bonds can lead to polarity of molecules and affect

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Melting point

Boiling point

Solubility

All of above

Glycine reacts with nitrous acid to form

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Methyl amino

Acetic acid

Zwitter ion

Glycollic acid

Smoke is a dispersion of

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Gas in gas

Gas in solid

Solid in gas

Liquid in gas

Which one of the following oxides is basic.

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MnO

Mn2O3

MnO2

Mn2O7

Which of the following gas is not used as carrier gas in GC.

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Argon

Nitrogen

Helium

CO2

The glow of yellow phosphorous as is result of slow oxidation in air is called.

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Luminescence

Bioluminescence

Photolysis

Chemiluminescene

VBT does not edplain

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Absorption spectra

Color of transition metal ion

Heat of formation

All above

Which of the following type of polymerization is used for the preparation of synthetic rubber.

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Free radical

Zingler natta

Cationic

Anionic

Which of the following process is used for the removal of particulates.

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Wet removal by precipitation

Sedimentation

Diffusion and impaction

All above

A minor constant is one whose amount in the sample is

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0.1 to 1 %

0.01 to 1%

1 to 10%

None of the above

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

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

Which of the following mixture is used as most popular flame in AAS.

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Acetylene air

Acetylene O2

Hydrogen air

Hydrogen O2

Which among the following is secondary pollutant.

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CO

CO2

PAN

Aerosol

Excluding H-atom , Hydrogen bond never involves more than atoms.

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One

Two

Three

Four

The bond between two identical non metal atoms has a pair of electrons.

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Unequally shared between the two

Transferred fully from one atom to another

With identical spins

Equally shared between them

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