Question # 1

The most common beta brase with a composition of 60 % copper and 40% zinc is called.

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Yellow brase

Red brase

Muntz metal

None of above

Various compound corresponding to molecular formula C1H10 are.

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Functional isomers

Position isomers

Chain isomers

None of the abvoe

Separation of isotopes of uranium is carried out by

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CaF2

SF6

HF

All above

The branch of chemistry dealing with the study of reactions in the Uv visible region of the spectrum in known as.

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Kinetics

Photo chemistry

Surface chemistry

Catalysis

Which of the following techniques is used for cleanup of samples prior to introduction into chromatographic column.

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Paper chromatography

TLC

Solvnent extraction

Solid phase extraction

Both C and D

A combination of atomic orbitals produces a large number of closely special energy states brown as.

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Packet of energy

Band of energy

Botha a and b

None of the above

Which is not an ore of aluminium.

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Baxuite

Cryolite

Monazite

Corundum

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

Which of the following material is a constituent of crop residue.

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Cull

Fruit

vines

Bagasse

All above

Which element out of the following can exhibit a maximum co valency of seven.

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Chlorine

Fluorine

Sulphur

Both Cl and F

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

The liquor is screened to exclude ________ material

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Fibrous

Polymers

Maltose

Sucrose

What is the purpose of molybdenum in steel alloying.

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To increase dynamic and high temperature strength and hardness

To increase brittleness

To increase corrosion and resistance

All above

Which of the following device is used to measure the surface tension.

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Polarimeter

Viscometer

Refractometer

Stalagnameter

Which of the following configuration of an ionic species represents psedue noble gas configuration.

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ns2

ns2 np6

ns2 np6 nd 10

ns2 np3

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

Which of the following is not chemical characteristics of water.

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pH

COD

BOD

Colour

If Principal quantum number n = 4 the quantum number l can have calue.

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1,2,3 and 4

0,1,2 and 3

1,2 and 3 only

None of the abvoe

Electron affinities of halogens are in the order.

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F > Cl > Br > I

Cl > F > Br > I

Cl > Br > I > F

Cl > Br > F > I

Which of the following salt is not used in salt bridge to minimize liquids junction potential.

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KCl

NH4Cl

KNO3

CaCl2

Permanent hard water is softened by addition of.

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Na2CO3

CaCO3

MgCO3

ZnCO3

The strongest acid is.

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HNO2

HNO3

H2N2O2

HNOS

What is abuckyball

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A carbon molecule

Nickname for Mercedes -Benz's futuristic concept car (CIII)

Plastic explosives nanoparticle (C4)

Concrete nanoparticle with a compressive strength of 20 nanonewtons(C20)

The most stable oxidation state shown by lead is.

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+2 , +4

+2 only

+3 , +4

+4 only

Lux -Flood concept is a dono-acceptor system of.

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Proton

Electron pair

Neurtron

Oxide ion

The halide which is inert to water is

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PCl5

SiCl4

BCl3

SF3

A theoretical link between quantum mechanics and thermodynamic is.

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Electrochemistry

Kinetic theory of gases

Spectroscopic analysis

Statistical thermodynamics

Ozone filters out radiation below.

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o

1000 A

o

2000 A

o

3000 A

o

4000 A

The element having highest ionization energy and least electron affinity belong to

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Period 1 , group 18

Period 2, group 17

Period 2, group 1

Period 2, group 2

Which of the following contains isoprene unite.

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Natural rubber

Nylong -6,6

Polyethylene

Decron

The most important problem regarding nano chemistry

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Elucidation of relationship between also and chemical reactivity of particle

Determination of size of particle

Determination of reactivity of particle

Determination of physical properties of nano particles.

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