Question # 1

Which substances is not used as an additive in paper industry.

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Glucose

Starch

Alum

None of these

Which of the following equations represent linear free energy relationship.

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Hammett equation

Taft equation

Helmholtz equation

Differential equation

Monel metal is a alloy of Ni which constrains Ni uptown

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50%

60%

70%

80%

Halogens are coloured because.

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They are strong oxidant

Their molecules are held together by weak van der Waals forces

Their atoms absorb radiations form visible range causing the excitation of valence electrons to higher energy of levels

Their molecules absorb light radiation forming the oxcited state.

Which of the following statements is false about transition metals.

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They form complexes

They show variable valency

All transition metal compounds are paramagnetic

They form coloured ions

The ease of hydrohalogenation of alkyl halide with alcoholic KOH is.

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3^o > 2^o > 1^o

3^o < 2_o <1^o

3^o > 2^o < 1^o

3^o < 2 ^o > 1^o

The efficiency of a reversible heat engine depends only on the

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Temperature of the heat sink

Temperature of the heat source

Temperature of the heat source and sink

Pressure of the fluid

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

Which of the following is a planar molecule.

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Acetone

Formic acid

Acetic acid

All above

Which of the following is an important aspect of industrial ecology.

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Minimising air emissions

Minimising liquid waste

Recycling after use

All above

A process in which no heat enters leaves the system is called.

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Isochoric

Isobaric

Adiabatic

Reveraible

Which parameter of a chemical reaction will change with the use of a catalyst.

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Delta F, change in free energy

Delta S, change in entropy

Delta E , change in internal energy

K, the rate constant

Albumin is classified as

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Simple protein

Conjugated protein

Lipoprotein

Derived protein

Which of the following techniques is used to separate a mixture of cations.

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GC

FPLC

Ion exchange chromatography

Size exchange chromatography

Which of the following elements is most electropositive.

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C

N

O

Be

Which of the following oxide formed in appreciable quantity in the atmosphere.

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NO

NO2

N2O

All above

What is the following is incorrect.

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Water is more polar than H2S

H2O2 is a planar molecule

Heavy water is produced by the exhauative electrolysis of water made acidic

H2O2 act both as oxidising as well as reducing agent in acidic medium

When borax is strongly hented, it gives

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B2O4

Na2B4O7

NaBO2

NaBO2 + B2O3

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

A red color gas, on condensing ti gives a dark blue liquid.

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NO

N2O

N2O3

N2O4

The alkali metal that react with nitrogen directly to form nitrides.

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Na

K

Rb

Li

Which of the following is capable of forming zwitter ion.

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Amino acids

Halo acids

Hydroxy acids

All of these

Which of the following test is not shown by proteins.

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Xanthoproten test

Ninhydrin test

Hopkin cole test

Muliken Barker test

Which of the following ahs non zero dipole moment.

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NH3

SF6

BF3

CO2

Which of the following analytical technique is used for the separation of an interfering substance or analyte from the mixture.

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Precipitation

Distillation

Electrode position

All above these

The formula of bleaching powder is.

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Ca OCl2

CaCIO3

Ca(CIO)3)2

CaOCI

Which of the following statement is not related to the characteristics of gaseous state.

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The inter molecular forces of attraction are not strong in gaseous state

The gases do not have definite shape and volume

The gases are characterized by low density.

The gases have low comprehensibility

Which of the following substances act as pollutant.

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Oils

Greases

Toxins

All above

Coordination compound show

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Structural isomerism

Stereo isomerism

Both A and B

None of above

In whihc period, the element with least ionization enthalpy belong to

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Group I

Group 2

Group 17

Group 18

Which of the following organic molecule is not aromatic.

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Benzene

Naphthalene

Anthracene

Cyclo-octatetraene

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