Question # 1

A 10% solution of sucrose contains 10 g of sucrose in how much volume of the solution.

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10 mL

100 mL

1000 mL

1 mL

Which of the following process is not sorbent separation technolgy.

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Penex

Parex

Molex

Olex

Used in producing intense light in cinematography

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Xenon

Krypton

Radon

Helium

Acute toxicity is expressed by the term

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LD50

IC50

I 1/2

Mean life

Alums are generally used

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In Dying and water proofing of fabric

In arrest bleeding

IN water purification

All above

Argon is used in filling of.

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Discharge tubes

Luminous tube

Fluorescent tubes

None of above

A catalyst

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Actually participates in the reaction

Changes the equilibrium concentration of the products

Does not affect a reaction energy path

Always decreases the rate for a reaction

A considerable number of atoms pertaining to the surface_____ with the decreasing the particle size.

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Increase

Decrease

No effect

Both a and b

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

The key element to be considered when evaluating a health hazard is.

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The amount of material the employee is exposed.

The total time of exposure

The toxicity of the substance

All above

Which of the following enthalpies is always negative.

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Enthalpy of melting

Enthalpy of combustion

Enthalpy of solution

Enthalpy of formation

Setting of cement is improved by

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Lime stone

Clay

Gypsum

Water

Nitric acid is used in manufacturing of.

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Explosive

H2SO4

Fertilizer

All above

The element with maximum first ionization energy is.

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B

N

O

C

Which of the following technique is most sanative one.

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Photomerty

AAS

Flame photometry

Flourimetry

20 micron =____________________ nm

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20 x10^-9

20000

200

20x10⁹

Yellow green flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

Which of the following sets of quantum number is possible for an electron in a 4f orbital.

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n = 4,l = 3, m = 4, s = +1/2

n = 4, l= 4, m = +4 , s = +1/2

n = 4, l = 3, m = +1, s = -1/2

n = 4, l = 4, m = +1 , s = -1/2

What refer to the casehardening process by which the carbon content of the steel ear the surface of a part is increased?

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Carburizing

Annealing

Normalizing

None of these

Which of the following instruments is used to measure the optical activity.

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Refractometer

Conductivity meter

Polarimeter

Torsion meter

Which of the following techniques is bulk technique.

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Powder XRD

Single Crystal XRD

SEM

TEM

Transition metal possess

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Definite color

Catalytic power

Both A and B

None of above

A closed system is one which can exchange with surrounding.

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Matter but not energy

Energy but not matter

Both matter and energy

Neither matter nor energy

Which of the following statement is not correct regarding galvanic cells.

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Oxidation occurs at the anode

Ions carry current inside the cell

Electrons flow around the external circuit. form cathode to anode

When the e.m.f. of the cell is positive cell reactionis spontaneous

A major constituent of materials one whose amount in the materials is

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1% or more

0.1%

0.01%

0.001 %

A steel cannot qualify for stainless prefix until it has at least how many percent of chromium.

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10 %

20 %

5 %

30 %

In which of the following compounds does hydrogen bonding occur.

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CCl4

NaH

HI

NH3

The formula of sulphur sequioxide

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SO4

S2O7

S2O3

SO3

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

What combination of elements has high electrical resistance high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating.

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Aluminium bronze

Nichrome

Hastelloy

None of above

The freezing point of a solvent

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Will increase on adding a solute

Will decrease on adding a solute

Will note change on adding solute

None of the above

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