Question # 1

Which of the following methods is used in qualitativ eanalysis.

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Physical method

Chemical method

Instrumental method

All above

Which of the following statement is related with CO.

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It is a colorless and tasteless gas

It has less affinity to words hemoglobin

It has a boiling point of -192 ^oC

It is a dangerous asphyxiant

The 'shape' of molecule ." Xe F6 is.

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Pentagonal bipyramidal

Regular octahedral

Distorted octahedral

Square planar

A group that causes deepning of the colour is known as

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Bathchromic

Hypsochromic

Hypochromic

Hyperchromic

Ingold's isoprence rule states that in terpenoids isopren units are joined.

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Head to tail

Head to head

Tail to tail

In a random order

Metals are

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Transparent

Tranalucant

Opaque

None of above

Which of the following mixture is used as most popular flame in AAS.

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Acetylene air

Acetylene O2

Hydrogen air

Hydrogen O2

The speed of a chemical reaction

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Is constant no matter what the temperature is.

Is independent of the amount of contact surface of a solid involved

Between gases should is all cases be extremely repid because the average kinetic energy of the molecules is great

Between ions in aqueous solution is extremely rapid because there are no bonds that need to be broken

The large increase in the rate of a reaction on rise in temperature is due to.

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The lowering of activation energy

The decreases in mean free path

The increase in collision frequency

The increase in the number of molecules having more than the threshold energy

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Which of the following statements about anhydrous aluminium chloride is correct.

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It exist as AlCl3 molecules

It is not easily hydrolysed

It sublimes at 100 ^oC under vacuum

Boron does not form B³⁺ ions

The atomic and ionic radii value on moving from left to right in the sereis.

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Increase

Decrease

Does not change

None of above

Lux -Flood concept is a dono-acceptor system of.

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Proton

Electron pair

Neurtron

Oxide ion

The green colour of glass is due to the presence of.

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Chromium (III)

Cobalt (II)

Mn (IV)

Iron(III)

The elements with highest electron affinity belongs to.

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Period 2 , group 17

Period 3, group 17

Period 2, group 18

Period, 2 , group 1

In Dumas method, the volume of the gas collected is equivalent to which of the following gases set free from the compound.

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Ammonia

O2

N2

NO

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

DDT is

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Biodegradable pollutant

Nodegradable contaminant

Air pollutant

An antibiotic

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

HCIO evolves Cl2 and O2 when dissolve

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Ca

Ni

Cu

Any of above

Which of the following can be used as drying agent of ammonia.

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CaO

Anhydrous CaCl2

P2O5

Conc. H2SO4

The maximum noise level at which a man can work for 8 hours is.

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80 dB

70 dB

90 dB

60 dB

Stainless steel contains.

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Fe + Cr+ Ni

Fe + Ni + Cu

Fe + Cr+ Cu

Cu + C + Ni

Used in producing intense light in cinematography

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Xenon

Krypton

Radon

Helium

The law of trinds was proposed by

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Dobereiner

Newlands

Lother Mayer

Chancourtois

Which of the following statement is not true regarding Open Hearth process.

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No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

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

What is the possible number of optical isomers for a compound contained 2 dissimilar asymmetric carbon atoms.

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2

4

6

8

Which of the following statement is not correct with respect to electrometric effect.

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It is permanent effect

It is brought into play instantaneously at the demand of attacking reagent

It proceeds a polar addition reaction

The original electronic condition is restored after the removal of tacking regent.

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

In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is

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In catalytic amount

One equivalent

More then one equivalent

Amount does not matter

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