Question # 1

Dyes used in photographic plates to make them panchromatic is.

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Cyanine dyes

Azine dyes

Phthalocyanine dyes

Acridine dyes

Which of the following properties of a system does not change in a state of equilibrium.

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Density

Pressure

Colour

All above properties

Enfleurage process is ued to extract the essential oils from

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Bark of plant

Seeds of plant

Leaves of plant

Flowers of plant

Which of the following is not an androgen i.e. male sex hormones.

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Androsterone

Testosterone

Oestrone

All of these are make hormone

Which of the following hydroxides is most stable.

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Mg (OH)2

Ca(OH)2

Sr (OH)2

Ba (OH)2

Electronegativity is given by

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Average of first and second ionization energies.

Average of first and second electron affinites

Average of ionization energy and electron affinity

None of the above

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 elements has the highest third ionization energy.

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Sodium

Magnesium

Aluminum

Silicon

Which of the following statements is false about enantiomers.

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Rotate plane of polarized light

Are superimposable mirror images

Nbonsuperimposable mirror images

All of the above

Which of the following techniques is capable of seperating minute quantities of the substances in a relatively short times with high resolutions.

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Gel electrophoresis

Capillary electrophoresis

GC

HPLC

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

Which of the following pair on aldol condensation followed by dehydration gives methyl vinyl ketone.

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HCHO and CH3COCH3

HCHO and CH3CHO

CH3CHO and CH3CHO

CH3COCH3 and CH3COCH3

Which configuration has lowest potential energy.

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Eclipsed

Staggered

Skew

All have same energy

Which substance is used as filler or additive in paper making.

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Starch

Glucose

Cellulose

Maltose

Which of the following range is correct for macro analysis.

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Minimum 100 mg

Minimum 10 mg

Minimum 1 mg

Minimum 1000 mg

The possible sub levels in the n = 4 energy level are.

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s,p,d

s,p,d,f

s

s,p

A chemical reaction resulting in a change in the electric charge on the reacting particles may be called as.

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Add ion reaction

Redox reaction

Elimination reaction

Chain reaction

Which of the following steps is not involved in chemical analysis.

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Separation of sample in pure form

Separation of the sample in the mixture form

Preparation of sample for the analyisis

Validity of experimental results

Who proved that all the six hydrogen atoms in benzen are equivalent.

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Kekule

Ladenburg

Faraday

Wohler

When propyne is treated with equeous H2SO4 in the presence of HgSO4 the functional isomer of the major product obtained in.

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Propanal

Acetone

Propane 2 -nl

Propanol

Drained sewage has B.O.D.

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More than that of water

Less than that of water

Equal to that of water

None of the above

What does 'F' stand for in AFM.

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Fine

Front

Force

Flux

Which of the following combination is used to make buffer.

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NaOH and HCl

KOH and H2SO4

CH3COOH and CH3COONa

CH3COOH and NH4OH

Among the unit cells given below, which has the highest symmetry

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Monoclinic

Cubic

Hexagonal

Orthorhombic

The lowest K.E. for an electron is three dime national cubic box is given by

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h²/ 8m^a

3h² / 8 ma²

9h²/ 8ma²

16h² / 8ma²

Which of the following elements does not impart any characteristic colour to the flame.

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Ca

Mg

Ba

Sr

Which of the following is not a ligand or complexing agent.

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NH3

CH3COOH

EDTA

CN-

The substance added to the soil in very small amounts are called.

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Macronutrients

Micronutrients

Fertilizers

None of these

Which of the following molecules belongs to C_av point group.

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H2O

H2S

NH3

BF3

The reduction in ozone layer would lead to

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Temperature chages

Rainfall failure

Increase uv radiation on earth

All above

Which of the following technique is used to separate substance based on their charge to mass ratio.

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HPLC

HPTLC

GC

Electrophoresis

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