Question # 1

The specific gravity of H2SO4 is

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1.37

1.84

1.17

1.57

Co ordinate covalent bond found is formed by the

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Transference of electrons

Sharing of electrons

Donation of electrons

None of these

Which of the following element has six electrons in the valence shell but cannot exhibit a maximum co valency of six.

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Sulphur

Oxygen

Selenium

Both A and B

Which of the following statement is related with CO.

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It is a colorless and tasteless gas

It has less affinity to words hemoglobin

It has a boiling point of -192 ^oC

It is a dangerous asphyxiant

The composition of mixture of clay and lime stone in the raw for cement material is.

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75% lime stone and 25% clay

25% lime stone and 75% clay

15% lime stone and 55% clay

30% limes stone and 79% clay

Which of the following chloride is soluble in hot water.

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Hg2Cl2

AgCl

PbCl2

All above

Graphite is a good conductor of electricity because is.

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Has sp2 hybridized carbon stoms

Has free electrons

Is crystalline

Has free atoms

The valence shell electronic configuration of group III A is.

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ns1 p2

ns2 p1

ns3p2

ns2p2

Which of the following pollutant result from roasting and heating processes.

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Dust

Smoke

Metal fumes

All above

Which of the following statement is not correct with reference to cell constant.

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The dimensions of cell constant is cm-1

It is used to determine the specific conductance

It is measured with KCl solution

Specific conductance does not vary with concentration.

Fertilizers are classified into

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Two major categories

Three major categories

Four major categories

None of above

If reaction A has an activation energy of 250 kj and reaction activation energy of 100 kj, which of the following statements must be correct.

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If reaction A is exothermic and reaction B is endothermic then reaction A is favored kinetically

At the same temperature the rate of reaction B is greater than the rate of reaction A

The energy of reaction A must be greater than the energy of reaction B.

The energy of reaction B must be greater than the energy of reaction A

Permanent hard water is softened by addition of.

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Na2CO3

CaCO3

MgCO3

ZnCO3

Among oxides of nitrogen all are gases except.

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N2O5

N2O

NO

N2O3

In radial direction the thermal conductivity of a nano tube is ______ watt/(m.k)

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3500

385

0

350

What is the minimum tensile strength of gray Cast Iron class 50

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25000 ibf /in²

50000 ibf/in²

100000 ibf/in²

900000 ib/in²

The entropy change accompanying any physical or chemical transformation approaches zero as T approaches zero. This statement refers to.

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Helmholtz law

Third law of thermodynamics

Second law of thermodynamics

Nernat heat theorem

When metal orbital are rotated in octahedral field the following representation obtained.

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t2 g + lg

a1 g

t 1 u

All above

Which of the following sulphide is yellow in colour.

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HgS

PbS

CdS

SnS

Yellow green flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

Which of the following statement is not related with industrial ecology.

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Study of interactions between human activities and its environment

Industrial ecology seeks to optimize the total industrial materials cycle from virgin material to finished product

Industrial impacts on the environment

Economic system are viewed in isolating from their surrounding

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

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Proton

Electron pair

Neurtron

Oxide ion

Nitric acid has the property

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Nitrating

Reducing

Redoxing

None of above

The relative error is usually expressed as

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Parts per ten

Parts per one

Parts per hundred

Botha C and D

Which of the following statements is not correct regarding electromagnetic spectra?

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The frequency of microwave is less than uv

The velocity of X-rays is more than uv

Cosmic rays have shorter wave length than radio waves.

The frequency of uv is greater than visible rays.

Bromine is soluble in

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Alcohol

Water

Chloroform

All above

One of the best fluorinating agent is

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XeF2

XeF4

XeF6

None of above

Dolmite is a mineral whose formula is.

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CaCO3

Mg CO3

CaCO3, MgCO3

CaSO4

Which of the following substance is generally not considered an air polutant.

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CO

CO2

SO2

NO2

VBT is unable to explain the nature of some of the complexes of.

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Cobalt

Copper

Nickle

Manganese

Which of the following does not represent Lewis acid.

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ZnCl2

FeCl2

BF3

Bul4

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