Question # 1

Pick out incorrect statement about K2Cr2O7

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It oxidizes acidified solution H2SO4 to S

It oxidizes KI to I2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Which of the following type of lattice has maximum numb of atoms per unit cell.

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Simple cubic

Body centred cubic

Face centred cubic

All of them

Soap is soluble in grease because it

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Is non polar

Has a hydrophobic head

Has a hydrophobic tail

Has an ionic head and a hydrocarbon tail

An stereospecific enzyme in one which catalyses

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Formation of one stercolsomer

Reaction of one stereoisomer only

Both of these

None of these

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

One of the best fluorinating agent is

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XeF2

XeF4

XeF6

None of above

Co ordinate compounds are

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Polar

Non polar

Dem polar

None of above

Which of tetra chloride is resistant to hydrolysis.

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CCl4

SiCl4

GeCl4

SnCl4

Which of the following elements display maximum tnedency to form P Pi - p PI multiple bonds with itself and with carbon and oxygen.

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N

p

Bi

As

Which of the following dyes belongs to the group of acridine dyes.

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Acriflavin

Alizarin

Indigotin

Cyanine

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

Among alkali metals, the least metallic element is.

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Li

Na

Rb

Cs

Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine.

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2,4 Dinitrophenyl hydrazine

Nitrous acid

Benzoyl chlride

None of these

Copper occurs in nature as.

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Native

Combined

Both native and combined

None of the above

Gases and dust particles are removed from H2SO4 by

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Tydal effect

Drying tower

Absorption tower

Contact converter

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 disposal method is used for agriculture wastes.

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Dump

Landfill

Incineration

Open burning

All above

A major constituent of materials one whose amount in the materials is

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1% or more

0.1%

0.01%

0.001 %

Each fat or oil in made up of

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A distinctive mixture of several different triglycorides

A distinctive mixture of several aldehydes

Mixture of above both

None of above

Turpentine is obtained from._______________

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Oak tree

Pine tree

Birch tree

Lemon tree

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

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

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Conductometry

Refractometry

Coulometry

Potentiaometry

Most commercial glasses consist of

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Lime

Soda

Silica

All

The formula of sulphur sequioxide

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SO4

S2O7

S2O3

SO3

Which of the following play significant role in depletion of ozone layer.

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Oxides of nitrogen

Oxides of carbon

Oxides of sulphur

None of above

Which of the following has the highest melting poing.

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NaCl

Li Cl

KCl

Rb Cl

Which of the following is the best indicator for titration of CH3COH with NaOH

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Methyl orange

Methyl red

Phenophthalein

Eosin

The overall energy change during the Cannot cycle to.

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Equal to zero

Equal to Q

Equal to W

Maximum

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

Which of the following is branch chain polymer.

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Glycogen

Terylene

PVC

Orlen

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.

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