Question # 1

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Casionic polymerization is initiated by

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BF3

NaNH2

Bul

Both b and c

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.

In normal mode of operations of liquid liquid partition, a polar stationary phase is used with a non polar mobile phase Which of the following solvent is used as mobile phase.

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Ethanol

Propanol

Butanol

Hexane

The main constituents of ___________ are boron oxide and silica.

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Pyrex glass

Low silica glass

Soda lime glass

Super hard glass

An aromatic compound has a molecules formula C7H8O. How many isomers are possible for this compound.

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3

4

5

6

Perdisulphuric acid is.

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Marshal acid

Caro acid

None of above

Any of above

What types of bonding occurs in d-block elements.

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Ionic

Covalent

Metallic

Both B and C

Which of the following pairs shows diagonal relationship

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Li and Mg

Na and K

Zn and Cd

Li and BE

Maximum desirable concentration of fluorides according to international standard is.

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10-100 ppm

1 ppm

100-200 ppm

10-20 ppm

The Ostwald process is the main method for the manufacture of nitric Acid in the fist step in this process is.

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Nitrogen and hydrogen react to form NH3

Ammonia is burned in O2 to generate N2 and H2O

Nitrogen and oxygen react to form NO2

Ammonia is burned with O2 to generate NO and H2O

[Ti(OH2)6]3+ gives colour

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Green

Red

Purple

Blue

Which of the following compounds liberates CO2 on heating.

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Li2CO3

Na2CO3

K2CO3

All liberate CO2 on heating.

Identify an oxygenated cyclic terpenoid

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a- pinene

Camphor

Citral

Geranial

Which of the following gas is not used as carrier gas in GC.

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Argon

Nitrogen

Helium

CO2

Which of the following anionic species is not separated by gravimetric analysis.

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Cl-

SO4

CH3COO-

PO4

Which of the following represent the fuming sulphuric acid

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H2S2O4

H2S2O3

H2S2O6

H2S2O7

Eutrophication is process which involves

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Depletion of ozone layer

Increase in the concentration of ozone in water

Decrease in the concentration of dissolved oxygen in water by algae

Decrease in the level of SO2 in air

Which process of adsorption of hydrogen on palladium is known as.

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Syneresis

Occlusion

Diffusion

Erosion

Which of the following pollutant results from combustion of fossil fuels.

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SO2

NO2

CO

All above

Which of the following steps is not involved in chemical analysis.

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Separation of sample in pure form

Separation of the sample in the mixture form

Preparation of sample for the analyisis

Validity of experimental results

Which of the following term is not used in pulping.

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Kappa number

Copper number

Bromine Number

Octane Number

How many planes of symmetry are present in benzene.

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1 plane

3 planes

5 planes

7 planes

An example of acyclic polytropenoid is

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Myrcone

Buna -S

Synthetic rubber

Natural rubber

A group that causes deepning of the colour is known as

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Bathchromic

Hypsochromic

Hypochromic

Hyperchromic

In the Mendeleev's periodic table elements are arranged in the increasing order of their .

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Numbers of neutrone.

Atomic number

Atomic mass

Atomic volume

Which of the following will exhibit variable electro Valency due to intert pair effect.

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Fe

Sn

K

Both Fe and Sn

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

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3500

385

0

350

Hydrogen bond is not electrostatic in nature is stated by

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Electrostatic approach

Valence bond approach

Molecular orbital approach

None of the abvoe

Which of the following techniques is used to reduce the need for large volumes of organic solvents.

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Solid phase extraction

Gel permeation

Electrophoresis

TLC

What refers to the application of any process whereby the surface of steel is altered so that it will become hard.

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Caburizing

Case harden zing

Ammealing

Surface hardening

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