Question # 1

The reverse of photo chemical reaction is called.

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Phosphorescence

Chemiluminescence

Fluorescence

Photscnaitization

The pink colour of phenolphthalen in in basic medium is due to the

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Cationic form

Anionic form

Natural form

OH- ions of the base

__________ are the extensions of bucky balls.

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Goodesic domes

Hexagons

Carbon nanotubes

AFM and STM

Which of the following functional groups is not involved in ion exchange chromatography.

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Weak acids

Strong acids

Strong bases

Carbohydrates

Which of the following process is used for the conversion of matte is to nickel.

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Orford process

Mond's process

Electrolytio process

All

Which of the following is not an alum.

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KAI (SO4)3 12 H2O

NaAI (SO4)2 12 H2O

NH4Fe (SO4)2 12H2O

FeAl (SO4)2 . 12 H2O

Monomer of neoprene rubber to

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1-chloro 1,3- butadiene

2- chlro, 1,3-butadiene

2-Bromo -1,3- butadiene

2-Methyl 1,3-butadiene

The main active contaminants of nuclear reactors are.

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Co- 60

Mn -54

Sr-60

All above

Which of the following is most soluble in water.

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BaSO4

Sr SO4

CaSO4

MgSO4

The bond order for BO molecule is.

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2.5

3.0

2.0

3.5

On the basic of CFT the bonding between the metal and ligand is totally

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Ionic

Covalent

Coordinate

Metallic

The pH Value 4.2 is of

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Vinegar

Lemons

Oranges

Tomatoes

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

If there are only two components in a solution with mole fraction X_Aand X_Bthen which of the following relation is correct.

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X_A + X _B = 0

X _A + X _B > 1

XA = XB < 1

XA = 1 - XB

The alkaline hydrolysis of fat is know as

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Condensation

Esterification

Saponification

Emulsification

What is the ASTM tension testing designation for standard method for steel products.

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A 370

E 345

E8

E 9

Equivalent conductance is expressed in the units.

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S cm-1 eq -1

S cm eq-1

S cm2 eq-1

S cm2 eq

The number 7.65 is rounded to.

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7.6

7.7

7.5

7.8

Aluminium does not corrode as does iron because.

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AI does not react with O2

a-protective layer of Al2O3 forms on the metal surface

AI is harder to oxidize than is Fe

Fe gives chathodic protection to AI

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

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

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Ca

Mg

Ba

Sr

Strongest inter molecular hydrogen bond is formed in

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H2O

NH3

HF

H2S

The common oxidation state of elements of group V A is.

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-3

+3

+5

Any above

The change in the concentration of the reactant of product per units time is called.

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Order of the reaction

Melecularity of the reaction

Rate of reaction

None of the above

Noble gases are used in discharge tubes to give different colours. Raddish orange glow is due to.

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Ar

Ne

Xe

Kr

Which of the following test to used to find out whether the observed data differ significantly from the one obtained from theoretical distribution.

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Chi square test

F -Test

Student's test

Coefficient of variance

Which of the following techniques is involved in purification of organic compound.

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Distillation

Sublimation

Solvent extraction

All above

Which of the following is not an adsorption indicator.

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Eosin

Bromocrsol green

Fluorescein

Phenolphthalein

A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called.

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Pi bond

Sigma bond

Polar bond

Non polar bond

Which of the following is not a polysaccharide

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Cellobiose

Cellulose

Insulin

Amylase

Which of the following in not a characteristics of crystalline solids.

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Sharp melting point

Isotropic

Long range orderly arrangemnt

None of above

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