Question # 1

The exchange equilibrium in gas chromatography depends on.

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Solubility or absorbability of he sample

The polarity of he stationary phase and analyte

The degree of H bonding

All above factors

The most electronegative element of the third period is.

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F

P

Br

Cl

Which of the following chemical strong oxidizing agent is used in COD test.

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KMnO4

H2SO4

CH3COOH

K2Cr2O7

All the member of group III A are metals except.

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B

Ai

Ga

In

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

Which of the following is not evoked in quantum theory?

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Schrodinger wave equation

The rigid rotor approximation

The particle in a box

Boltzmann distribution

Which of the following iso -electronic ion would require least energy for the removal of electron.

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Ca2+

Cl-

Ar-

K+

The reagent which can react with 1- chlorobutane to give substitution product is

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Al Cl3

KOH -CH3OH

NaCN

Mg/ether

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

Which of the following is an acceptable value fo the molecularity.

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0

2

6

3/2

For assciated liquids, the value of d/M n x 10⁸ should be (where d is the density, M is the molar mass and n is the coefficient of viscosity)

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Zero

Infinte

Higher than 70

Less than 70

The reciprocal of the coefficient of viscosity in called.

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Density

Specific gravity

Fluidity

Conductance

What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids.

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Alkaline

Alkydes

Alcocide

Ketones

Which of the following statement is not relat4ed wiht SO2

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It is a colourless gas

It has sharp and pungent odour

It is moderately soluble in water

It is reduced slowly in clear air to H2S

Which of the following statements is not correct with respect to applications of Hammett equations.

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It develops a quantitative relationship between structure and reactivity

This equation on can be used to calculate the value of pK_a

This equation does not help to calculate the rate of some reactions

This equation has mechanistic implications

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

In Serpekr's process the ore is treated with which of the following.

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Carbon

Nitrogen gas

Both A and B

None of these

Which of the following is not a proper use of Ni.

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It is used as catalyst

It is used in alloy formation

It is used in the preparation of Monel metal

It is attached by alkalis

What corrosion occurs under organic coating on metals as fine wavy hairlines?

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Stray current corrosion

Microbiological corrosion

Filiform corrosion

Simple corrosion

What is a coal that has been previously burned in an oxygen poor environment?

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Tuyere

Coke

Silver

Diamond

Which of the following is not related to the limitations of Bohr's model.

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It does not applicable to more than one electron system.

It does not explain the extra lines obtained in the H-spectrum

It considers the electron as particle

It considers the electron as a wave.

Which of the following is not a characteristics of terpenoids.

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They are pleasant smelling liquids

They are steam volatile

They are nitrogenous bases

they are insoluble in water

The presence of which of the following in drinking water is responsible for mottling of teach.

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Mercury

Iodine

Chlorine

Flourine

Which one of the following noble gas is obtained by radioactive disintegrastion

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Kr

Br

Rn

Xe

The bond length is measured by

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X-ray diffraction

Neutron diffraction

Microwave spectroscopy

All of above

The basic strength of hydrides of group 15 elements very in the following order.

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NH3 > PH3 > AsH3 > SbH3 >BiH3

PH3 > NH3 > AsH3> SbH3 > BiH3

BiH3> NH3 >PH3 > AsH3 > SbH3

NH3 > PH3 > SbH3 > AsH3 > BiH3

Smoke is a dispersion of

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Gas in gas

Gas in solid

Solid in gas

Liquid in gas

The unit of nucleic acid having base sugar combination is called.

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Nucliec acid

Nucleoside

Nucleotide

None of these

Which of the following statements do not represent Lewis idea of acids and base?

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Compounds which have completely filled orbitals

Compounds which have incompletely filled orbitals

Compounds in which the central atom can expand its octel

All simple metal ions like Ag+, Al3+ etc.

Ground state electronic configuration of valence shell in N2 m lecule is written as (a2s)2, (o*2s)2 , (pi sp)4, (o2p)2, Hence, the bond order of N2 molecule is.

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1

2

3

0

Which of the following is a mode of controlling pollution in big cities.

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Cleanliness and less use of insecticides

Proper disposal of organic wastes, sewage and industrial effluents

Broader roads and shifting of factories out of the residential areas

All of above

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