Question # 1

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

automobiles

The action of all the relations of all the organism to their environment is called

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Biology

Botany

Ecology

Archiology

Which of the following source of energy is abundant everlasting and non polluting.

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Nuclear

Electric

Solar

All above

Compounds consisting of two or more interlocked rings are called.

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Inclusion compounds

Cage compounds

Catenanes

Crown other

Dyes used in photographic plates to make them panchromatic is.

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Cyanine dyes

Azine dyes

Phthalocyanine dyes

Acridine dyes

CFT can very well explain

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Color

Magnetic properties

Spectra of transition metal

All

HCIO evolves Cl2 and O2 when dissolve

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Ca

Ni

Cu

Any of above

Reaction in which molecules absorbing light do not themselves react but induce other moleculaes to react are called.

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Chain reactions

Photosenaitized reactions

Reversible reactions

Free radical reactions

Volta metric technique using a dropping mercury electrode is called.

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Amperometry

Coulometry

Polarography

Potentiometry

During the preparation of soap the liquid separated by distillation is

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Sodium hydroxide

Oil

Fats

Glycerol

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

Considering the element B,C, N, G and Si, the correct order of their non- metallic character is.

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B > C > Si > N > F

Si > C > B > N > F

F > N > C > B > Si

F > N c > > SI > B

Which type of organic compounds does fat belong to.

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Alkene

Ester

Alkanol

Alkanoic acid

Which ratio decides the efficiency nano substance.

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Weight /volume

Surface area/volume

Volume/weight

Pressure/volume

Iron is said to be abundant in nature. About how many percent of the earth’s crust is iron.

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10%

5%

20%

8%

What letter suffix steel identification means that it is steel with boron as an alloying elements.

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xxL xx

xxBxx

xxHxx

xxKxx

Which of the following analytical technique is based on the refraction of radiation.

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Conductometry

Refractometry

Coulometry

Potentiaometry

In proper rotation (Cn) an object is rotated through an angle of.

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a/n radians

2n/n radians

3n/n radians

4n/n radians

Which of the following process is involved in getting back nitrogen into atomosphere.

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Nitrification

Denitricication

Ammonification

All above

Separation of isotopes of uranium is carried out by

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CaF2

SF6

HF

All above

The formula of Borax is.

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Na2B4O7 6H2O

Na2B4O7 8H2O

Na2B4O7 10H2O

Na2B4O7 12H2O

In an adiabatic system, if work in done, the temperature must.

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Increase

Decrease

Remain the same

Increase than decrease

Bioconversion of biomass can be used for.

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Heating purposes

Power production

Methane production

All of the above

The variable valency is generally observed in case of.

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Transition elements

Inert gases

Normal elements

Non- metallic elements

Which of the following analytical method is used for the separation of dissolved components from solutions.

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Chromatography

Dialysis

Solvent extraction

Distillation

Relative order of acidity of oxy acid

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HCIO > HCIO2 > HCIO3 > HCIO4

HCIO4 > HCIO3 >HCIO2 > HCIO

HCIO3 > HCIO2 > HCIO > HCIO4

HCIO2 > HCIO4 > HCIO3 > HCIO

Metal are generally elements

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Electronegative

Electropositive

Neutral

None of the above

Helium oxygen mixture is used by deep sea divers in preference to nitrogen oxygen mixture, because.

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Helium is much less soluble in blood than nitrogen

Nitrogen is much less soluble in blood than helium

Due to high pressure deep under the sea, nitrogen and oxygen react to give poisonous nitric oxide.

Nitrogen is highly soluble in wateer

Bromine is used as

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Fungicides

Herbicides

Germicides

Insecticides

Estimation of nitrogen in proteins is generally arrived out by the method.

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Duma's method

Van Slyke method

Kjeldahl's method

Carius method

What is the lowest temperature diffusion hardening process and does not require a quench

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Carburizing

Tempering

Nitriding

Melting

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