Question # 1

Which of the following is not a characteristics of terponoids.

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They are pleasant smelling liquids

They are steam volatile

They are nitrogenous bases

They are insoluble in water

The correct order of reactivity among I , Ii, and III IS.

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i > ii >iii

i > iii > ii

II > III > I

III > II > I

The colloidal solution of arsenic sulphide prefers to absorb

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NO3

K+

S2-

H+

Which of the following statement is not related with the effect of thermal pollution.

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Decrease in BOD

Increase in BOD

Reduction in DO

Change in algal production

Equal volumes of all gases, under similar conditions of temperature and pressure, contain equal number of molecules. This is a statement of.

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Graham's law

Dalton's law

Avogadro' law

Boyle's law

The absorbance is directly proportional to the path length in the flame and to the concentration of atomic vapor in flame is a statement of.

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Lambert's law

Beer's law

Honery's law

Starke law

Used in producing intense light in cinematography

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Xenon

Krypton

Radon

Helium

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

Un-like s -block elements d-block elements form which compounds as well

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ionic compounds

Co valent compound

Co ordinate compounds

None of above

What is a measure of rigidity?

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Stiffiness

Jardmess

Strength

Modulus of elasticity

Which of the following metal acts as pollutant.

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Hg

Pb

Zn

Ni

All above

Which of the following has the highest melting point.

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NaCl

KCl

MgO

BaO

An Ideal gas is one which obeys all the gas law at.

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Low pressure

High Pressure

Low and High temperature

All condition of pressure and temperate re

In the Aluminothermite process, aluminium acts as.

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An oxidizing agent

A reducing agent

A flux

A Solder

The number of Glass products now manufactured is.

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25,000

75,000

50,000

All of these

Which of the following is not biological characteristics of water.

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COD

Animals

Plants

Viruses

IUPAC name of HCONH2 is.

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Methanamide

Methanoylamine

Ammoethanal

Formanide

In which polymer the strength of inter molecular forces is maximum

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Elastomers

Thermoplastic

Fibre

Cross linked polymer

The maximum degree of freedom for a pure substance under equilibrium constitutions is

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1

2

3

zero

Ingold's isoprene rule states that in tepenoids isoprene units are joined.

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Head to tail

Head to Head

Tail to Tail

In a random order

Strength of H bond in inter mediate between

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Van der Waals forces and covalent bond

Ionic and covalent bond

Ionic and metallic bond

Metallic and covalent

The maximum number of electron is an atom with l = 2 and n = 3 is

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2

6

10

12

Beside the common silica based SPE particles, polymer supports are also available They have advantages over silica based SPE particles, Which of the following reason is possible.

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These are stable over a wide pH range.

These do not possesses residual silica groups

These are designed to be wettable and have high capacity than silica base particles.

All above

Which one of the following sets of elements has the strongest tendency to form positive ions in gaseous state.

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Li, Na, K

F, Cl, Br

Be, Mg, Ca

O, S , Se

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

If the values of standrd deviations for the first and second method differ, then which of the following test helps one to know whether this difference is significant.

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Student's test

F-Test

Chi square test

Standard deviation

Which of the following statement is not true regarding Open Hearth process.

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No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

Dull red flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

It has been observed that if one goes on adding KNO3 solution to a precipitate of AgCl the solubility of these precipitates goes on increasing with increasing concentration of K+ and NO3= ions which are not common to AgCl This is due to which effect.

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Divers ion effect

Uncommon ion effect

Activity effect

All above

Amino acids are are important in biochemistry which of the following statements is not correct regarding amino acids.

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These are amphoteric substances tend to undergo internal protein transfer

In aqueous solutions these substances tend to undergo internal proton transfer

These for zwitter ion in aqueous medium

These always contain two amino groups.

Most Hazardous metal pollutant of automobile exhaust is.

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Tin

Mercury

Cadmium

Lead

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