Question # 1

Which of the following health effect is caused by mercury.

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Nerve damage

Brain damage

Kidney damage

All above

What field of study encompasses procurement and production of metals.

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Metallurgy

Geology

Material science

Metalgraphy

The most widely used method of extracting metal ions is the formation of a chelate molecule with an organic chelating agent The chelating agents are.

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Strong acids

Strong bases

Weak bases

Weak acids

What is the colour of pulp obtained from chemical pulping.

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Black

Brown

Blue

Red

How many sigma and pi bonds are there in a CO2 molecule.

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2 sigma

2 sigma and 4 pi

2 sigma and 2 pi

4 sigma and no pi

The ion that is isoelectornic with CO is

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CN-

O2+

CO2-

N2+

Which of the following expressions represent the equivalent conductance.

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A = l s x 1000/V

A = Ls x 1000/C

A = Ls l/A

A = Ls/V

Which of the following statement is not related with environmental pollution.

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Direct or indirect change in any component of the biosphere

Undesirable change in the physical characteristics of the air

Undesirables change in the biological characteristics of the soil

not affecting adversely the industrial progress

Which of the following statement is not related to MOT

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Atomic orbitals lose their identities

MOTgives as idea of denationalization

MOT uses all the orbitals and elections

It treated bond as purely covalent

Which of the following is atmospheric pollutant.

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CO2

CO

O2

N2

Ozone filters out radiation below.

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o

1000 A

o

2000 A

o

3000 A

o

4000 A

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware, etc. when mixed wiht cold conc. H2SO4

The following statements are true except one which one.

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Carburizing does not harden a steel

Flame and induction hardening require the use of hard enable steels.

Quench –hardened steel does not require tempering to present brittleness

None of these

What element is added to copper to make it extremely hard.

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Aluminum

Zinc

Lead

Tin

iodine is used as a

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Photography

Manufacture of dyes

Analgesic

All above

According to the VSEPR theory, the shape of the SO3 molecule is.

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Pyramidal

Tetrahedral

Trigonal planar

Distorted totrahedron

Which of the following compounds combines with hemoglobin.

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CO2

CO

NO

N2

VBT does not edplain

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Absorption spectra

Color of transition metal ion

Heat of formation

All above

Which of the following is diamagnetic

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O2

O2+

O2-

O2 ^2-

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

Photochemical among is generally formed

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In early hours of winters

Around mid day in summer months

When intensity of solar radiation sis very low

When concentration of particulate matter is very low.

Which substance has the greatest lattice energy.

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CuBr

MgO

KI

NaF

The expected specific waste fo petroleum industry is.

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Asphalt and tars

Paper

Cloth

Fibre

The statement that heat cannot flow spontaneously from a colder to a hotter body is the result of.

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The first law of thermodynamics

The second law of thermodynamics

The third law of thermodynamics

Henry's law

Copper is resistant to

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Air

Water

Acid and Alkali

All of the above

Metal are

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Hard

Ductile

Malleable

All

The equivalent conductance (^) and molar conductance ( ^ m ) of BaSO4 are related as.

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^ = ^m/2

^/2 = ^m

^ = ^m

^ = ^m/4

DTA is of great importance in which of the following field

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Ceramic

Metallurgy

Mineralogy

All

Alkaline hydrolysis of chloroform produces.

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HCCO

HCOO - + CO

H3COH

CHCL2 OH

Red brass contain about how many percent of zinc.

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20 %

15 %

30 %

25 %

In C4-axis of rotation, an object in rotated through an angle of.

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120^o

180^o

100 ^o

90^o

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