Question # 1

Which of the following statements is not related with chemical equilirbium.

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The properties of the system become constant

The equilibrium can be approached from either direction

The chemical equilibrium is static is nature

A catalyst can hasten the approach towards equilibrium

Commercial detergents contain mainly ___________

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RCOON

RONa

RSNa

All above

Which of the following solution has pH= 11?

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1 X 10^-11 m NaOH

1 x 10^-11 m HCl

1 x 10^-3 M NaOH

1 X 10 ³ M NaOH

The particle would be stationary in a lattice only at.

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273 K

0 K

298 K

373 K

Which of the following gas protects us form harmful effect of uv radiation.

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SO2

NO2

CO

O3

Correct order of increasing ______ I effect of groups is

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----- NO2 >-----------CN > ------------COOH > -------------F

--------F > -------------COOH>----------CN>--------NO2

-----F> -------------CN>--------NO2 > COOH

-------CN > ------------COOH > -----------NO2 >----------F

In the Aluminothermite process, aluminium acts as.

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An oxidizing agent

A reducing agent

A flux

A Solder

The formula of copper pyrite is.

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CuFeS

CuFeS2

Cu2FEs

Cu Fe2S

Which of the following process is used for the removal of gases.

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Precipitation

Chemical reaction in the atmosphere

Absorption

All above

Dull red flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

What is the equilibrium temperature of transformation of austenite to pearlite

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1000 F

1333 F

166 6 F

1222 F

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 molecules can oxhibit geometrical isomerism.

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CH3CH = CH2

CH3CH = CHCH3

(CH3)2 C = CH2

CH3CH = C(CH3)2

Which of the following physical property forms the basis of radio chemicals methods of analysis.

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Absorption of light

Emission of light

Radioactivity

Thermal conductivity

Argon is used in filling of.

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Discharge tubes

Luminous tube

Fluorescent tubes

None of above

The vapour pressure of a liquid

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Always increase's with temperature

Always decreases with temperature

Is independent of temperature

Increase up to the boiling point

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

Elements in the same vertical group of the periodical have same

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Number of electron

Atomic number

Number of valence elections

Electronic configuration

The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of.

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Law of dynamic equilibrium

Le Chatlier's principle

Law of mass action

Solubility product principle

Which of the following is not a component of AAS.

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Hollow cathode lamp

Burner

Detector

Tungsten lamp

Biogical role of nucleic acid doe snot include

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Genetic continuity

Protein syathesis

Hybridization

Mutation

Apoenzyme is

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Hydrolytic enzyme

Oxidative enzyme

Coenzyme

Protein part of enzyme after removal of coenzyme

Ozone layer of stratosphere requires protection from indiscriminate use of.

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Fungicides, insecticides, bactericides and medicines

Aerosols and high flying jets

Atomic explosions and industrial wastes

Weather ballons

Each of the following compound react with Grignard's reagent to form alkane exxcept.

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Ethanal

Ethanoic acid

Ethanol

Ethync

Which of the following acid radical is not interfering.

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Phosphate

Borate

Flouride

Sulphate

The current voltage characteristics forms the basis of.

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Thermal analysis

Potentiometry

Polarography

Colorimetry

Chief source of water and soil pollution in

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Mining of ores

Thermal power plant

Agro industry

All the above

The key element to be considered when evaluating a health hazard is.

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The amount of material the employee is exposed.

The total time of exposure

The toxicity of the substance

All above

The units of surface tension in SI system are

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Joule m-1

Newton m-1

Erg cm-1

Dynes cm-2

Usually the rate of the reactions is expressed as.

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mol dm-1

mol dm-3 s-1

mol dm-2 s-1

mol 2 dm-3 s-1

Indigotin is a dye obtained from indigo plant which belongs to the group of.

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Substantive dyes

Mordant dyes

Vat dyes

Disperse dyes

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