Question # 1

A terpenoid which as an alcoholic group in the molecule is

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Citral

Camphor

Menthol

Carvone

Sanger's reagent is

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Carbobenzyloxy chlride

Dimethyl amino sulphonyl chloride

I-Fluoro -2,4-dinitrobnzene

2,4- Dinitrophenyl hydrazine

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

Which of the following statements is not correct. with respect to resonance.

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The position of atomic nuclei mus be same

The limiting structures must have same number of paired and unpaired electrons.

The energy of the various limiting structures must contribute equally

All above

Ozone layer of upper atmosphere is being destroyed by

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chlorofluorocarbons

SO2

Photochemical oxidants O2 and CO2

Smog

Which among the following hydride is ionic in nature.

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Ammonia

Protium oxide

Calcium hydride

Sulphane

During the preparation of soap the liquid separated by distillation is

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Sodium hydroxide

Oil

Fats

Glycerol

The Lambert beer law states that

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Transmission is directly proportional to path length

Transmission is directly proportional to concentration

Absorbance is inversely proportional to transmission

Absorbance is directly proportional to concentration.

An example of acyclic polytropenoid is

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Myrcone

Buna -S

Synthetic rubber

Natural rubber

Which of the following reacts with hemoglobin of blood and produce toxic effect.

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Carbon dioxide

Carbon monoxide

Oxygen

Carbon suboxide

_{Which of the following salt is soluble in water.}

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BaCO3

SrCO3

CaCO3

K2CO3

Ground water is threatened with pollution from which of the following source.

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Domestic wastes

Industrial wastes

Agricultural wastes

All above

Which of the following is not an alum.

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KAI (SO4)3 12 H2O

NaAI (SO4)2 12 H2O

NH4Fe (SO4)2 12H2O

FeAl (SO4)2 . 12 H2O

Formula of orthophosphoric acid

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H2PO4

H3PO2

H2P2O5

The statement that heat cannot flow spontaneously from a colder to a hotter body is the result of.

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The first law of thermodynamics

The second law of thermodynamics

The third law of thermodynamics

Henry's law

Which of the following statement is no true with respect to nitrogen dioxide.

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It is produced by the oxidation of NO

Its small concentration has been detected to lower stratosphere

It is major pollutant

It does not absorb sunlight.

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

The rays emitted by the cathode in a gas discharge tube under low pressure and high voltage of electricity are called cathode rays. Which of the following properties are not related to cathode rays.

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These travel in a straight lines.

These are deflected by magnetic and electric field.

Minerals Fluoreace with a characteristic color when placed in a beam of cathode rays.

These are dependent of the material used for the electrode.

Hydrogen bons holding the strand to nucleic acids are formed between

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Sugar and base units

Base unit

Sugar ane phosphate units

Sugar units

The IUPAC name of ethylene oxide is.

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Epoxy methane

Oxcethene

Methoxymethane

All of the above

In the forth floatation process for the purification of ores, the ore particles float because.

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They are light

Their surface is not easily vetted by water

They bear electrostatic charge

They are insoluble

The tyndall effect is not observed in

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Suspensions

Emulsions

Colloidal solutions

True solutions

To complete transfer of a shared pir of electrons to one of the atoms joined by a double or triple bond at the requirement of an attacking reagent is known as.

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Inductive effect

Resonance effect

Eletromeric effect

Stark effect

Which of the following salt is water insoluble.

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K2SO4

Na2SO4

BaSO4

None of abvoe

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

To increase the life of filament and to low the heat conductivity a mixture in filled in electric bulb.

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Ar & N2

Ar & Kr

Kr & N2

Xe & N2

Stablization of particles and their reactivity is affected by.

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Surface properties

Bulk properties

Regardless to the surface properties

No of particles

Pick out the incorrect statement.

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Red phosphorus consists of a complied chain structure and black phosphorus has a layer structure.

Nitrogen shows a little tendency for catenation, because N-N a single bond is very strong.

The xamimum number of covalent bonds formed by nitrogen is four, since it has no d-orbitals in its valence shell

The group 15 elements do not form M5+ ions, but +5 oxidatin state is realized only through covalent bonding.

Which of the following molecules has the lowest average speed at 273 K.

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CO2

CO

CH4

O2

According to SHAB, Lewis acid are divided into.

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Two classes

Three classes

Four classes

None of above

According to SHAH concept the Lewis bases were classified on the basis os.

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Charge ion size

Polarization consideration

Electron and co coordinating ability

All of above

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