Question # 1

Conjugation of chromophore

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Deepens the colour

Lightene the colour

Shifts absorption to shorter wavelength

All of these

Which one of the following set of raw material is most suitable for manufacture of urea.

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CH4N2 and CO2

H2CO2 and H2O

H2O N2 and H2

H2O N2 AND KCl

Which is the correct order of wave number of the following redistions.

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X-rays > uv > Infrared > visible> radio waves

X-rays > uv > visible > Infrared > radio waves

X-rays > radio waves > uv > visible > Infrared

X-rays > Infrared > uv> visible > radio waves

Which of the following analytical technique is used for separating similar substance by preferential adsorption or partition between two phases.

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Distillation

Dialysis

Chromatography

Solvent extraction

The stabilization of the dispersed phase in a lyophobic sol is due to

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Liking for the dispersion medium

The surface tension of the medium

The formation of an electrical layer between the two phases

The viscosity of the medium

In urea the amount of nitrogen is

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82.0%

46.0%

33.0%

21.0%

Lime water is an aqueous solution of.

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MgSO4

Ca (OH)2

CaCO3

CaSO4

The normality of 2.3 M H2SO4 solution is.

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0.46 N

0.23 N

2.3 N

4.6 N

What nickel alloy has high electrical and corrosion resistance and high strength at red heat temperature and contain 15 to 20% chromium.

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Alnico

Nichrome

Invar

None of above

Which of the following statement is not correct n respect of Arrhenius concept.

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The concept is applicable only for aqueous systems.

Neutralization takes place in aqueous mediam only

TH+ ion cannot remain as such in water

This concept is applicable for non aqueous system only.

Transition elements, in general exhibit the following properties, except one Name that property.

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Variable oxidation state

Natural radioactivity

Tendency to form complexes

Formation of alloys

Which of the following statement is not relevant with nitrous oxide.

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It is a colorless and odourless gas

It is non toxic gas

It is present in the atmosphere in higher concentration

It has high reactivity in the lower atmosphere

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 is the correct order of interactions.

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Covalent < hydrogen bonding < Van Der Waal's < dipole -dipole

Van der Waal's < hydrogen bonding < dipole -dipole < covalent

Van der Waal's < dipole -dipole < hydrogen bonding < covalent

Dipole-dipole < Van der Waal's < hydrogen bonding < covalent

Which of the following reactions does not take place with light radiation.

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Oxidation

Reduction

Polymerization

Double displacement

Enzymes are

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Complex non living compunds

Laving organisms

Complex protein molecules

Bacterial colonies

What corrosion occurs under organic coating on metals as fine wavy hairlines?

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Stray current corrosion

Microbiological corrosion

Filiform corrosion

Simple corrosion

Which is not a pollutant from the exhaust of motor.

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Hydrocarbons

Carbon monoxide

NOx

Fly ash

The alternate feasible fuel for existence of mankind to

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Uranium

Wood

Bontonite

Cloth residues

B.P of heavy water is

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equal to that of ordinary water

greater than that of ordinary water

Less than that of ordinary water

equal to that of distilled water

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

Which of the following carbonates decomposes at the highest temperature.

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Mg CO3

CaCO3

Sr CO3

Ba CO3

Which of the following chemical strong oxidizing agent is used in COD test.

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KMnO4

H2SO4

CH3COOH

K2Cr2O7

The first ionization energy in electron volts of nitrogen and oxygen atoms are respectively given by.

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14.6, 13.6

13.6, 14.6

13.6, 13.6

14.6, 14.6

Which of the following statements is not related with principal requisites of water for industrial purposes.

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It should be pure and cool

It should not contain iron

It contains less quantity of line

It must be soft

Indicate false statement about stainless steel

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The density of stainless steel is about the same as carbon or low alloy steels

Stainless steels are poor conductors of heat

Stainless steels are poor conductors of electricity

Stainless steels have tensile moduli greater than those of carbon and alloy steels.

The temperate of a gas below which only the gas cools when allowed to expand is know as.

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Inversion temperature

Ideal temperature

Critical temperature

Joule Thomaon temperatu4re

The entropy of the universe

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Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

The glow of the yellow phosphorous as a result of slow oxidation in air is called.

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Chemiluminescene

Luminescence

Biolumineacence

Photolysis

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

Hydrometallurgy of copper involves extraction of copper from poor ores by which process.

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Dry process

Wet process

Both dry and wet process

None of these

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