Question # 1

Hypo is used in photography to.

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Reduce AgBr to metallic silver

Remove silver a silver salt

Remove undecomposed silver bromide as soluble complex

Remove reduced silver

During the titration of weak acid against NaOH the conductance of the solution after the neutralization point.

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Is constant

Decreases

Varies irregularly

Increase

Which of the following statements is not correct with the concept of Bronsted concept of acids and bases.

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An acid can donate a proton

A base can accept a proton

This concept has many bases that have OH- ions

This concept is more general

Which of the following energy is trapped by the autotrophic organisms.

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Mechanical energy

Electrical energy

Radiant energy

Electronic energy

Which of the following is renewable energy source.

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Moon

Wind

Sun

Ocean

Which of the following has hexagonal structure.

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Sodium chloride

Potassium choride

Diamond

Graphite

Which of the following detector is used in GC analysis

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Thermal conductivity detector

Flame ionization detector

Mass spectrometer

All above

The extinction co efficient has the units.

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cm2 mol -1

cm3 mol-1

mol cm-3

mol cm-1

The forces which holds the atoms together in a molecule is called

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Ionic bond

Covalent bond

Co ordinate bond

Chemical bond

Which of the following method is used to separate small molecules form the larges molecules from the larger molecules in diffusing through a membrane.

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Dialysis

HPLC

FPLC

TLC

Phosphorus is detected by fusing the organic compound with -------followed by extraction with H2O

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HNO3

H2SO4

Sodium per oxide

Ozone

Pick out the incorrect statement.

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Red phosphorus consists of a complied chain structure and black phosphorus has a layer structure.

Nitrogen shows a little tendency for catenation, because N-N a single bond is very strong.

The xamimum number of covalent bonds formed by nitrogen is four, since it has no d-orbitals in its valence shell

The group 15 elements do not form M5+ ions, but +5 oxidatin state is realized only through covalent bonding.

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

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Acridine

Cyanine

Methylene blue

Amido black

Which of the following interaction is the strong.

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Dipole -dipole

Ion induced dipole

Ion -dipole

Dipole induced diple

The by -product of the process of saponification is.

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Methanol

Glycol

Glycerol

Absolute alcohol

A colloidal system in which a liquid is dispersed in a solid is called a/an

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Emulsion

Sol

Gel

Precipitate

Which of the following techniques is used to separate a mixture of cations.

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GC

FPLC

Ion exchange chromatography

Size exchange chromatography

The percentage of nitrogen in Urea is _____________%

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46

37

82

50

The formula of copper pyrite is.

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CuFeS

CuFeS2

Cu2FEs

Cu Fe2S

Which of the following is NOT a hardware requirement for die casting.

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Water cooled metal cavities

Machined metal holding blocks

Ejection mechanism

Metal mold

Which one of the following statements regarding BF3 is not correct.

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It is an ionic compound

It is an electron deficient compound

It is a Lewis acid

It forms adducts

Which of the following analytical technique is based on the refraction of radiation.

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Conductometry

Refractometry

Coulometry

Potentiaometry

Which one of the following has the highest boiling point.

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H2O

H2S

H2Se

H2Te

Which of the following has maximum number of unpaired electrons.

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Fe3+

Fe2+

Co2+

CO3+

Which of the following dyes belongs to the group of acridine dyes.

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Acriflavin

Alizarin

Indigotin

Cyanine

Oxides ores of Aluminium

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Corundum

Bauxite

Diaspore

All above

Which of the following group reagent is used for III group of basic radical.

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Dilute HCl

H2S + HCl

NH4OH + NH4Cl

NH4OH + H2S

Metal are

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Hard

Ductile

Malleable

All

The concentration required to give a signal equal to three times the standard deviation of the baseline is called.

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Sensitivity

Detection limit

Signal to noise ratio

None of the above

Which of the following solution has highest normality.

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1 N H2PO4

0.5 N H2SO4

6 g NaOH per 100 cm3

4 g NaOH PER 1000 cm3

The particle motion in solids is

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Only vibratory

Only translator

Vibratory and rotatory

Only translatory

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