Question # 1

The pH of 0.001 N HCl is

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1

2

3

4

Which one of the following has the highest boiling point.

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H2O

H2S

H2Se

H2Te

Number of unpaired electrons in Cu2+ ions are.

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1

2

3

4

A stable molecule is a group of atoms held together by

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Chemical forces

Physical forces

Valence force

None of above

Which of the following technique is used for separation of volatile components.

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GC

HPLC

FPLC

TLC

Which one of following is paramagnetic and has the bond order equal to 0.57

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N2

H2+

O2

F2

According to systematic nomenclature which hydrogen compound is sulphane.

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HF

Si H4

SF4

H2S

The fluoride tooth paste contains

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SnF2 and Sn2P2O7

NaF

CaF2

None of these

The only oxidation state of alkali metals in their compounds is.

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+1

+2

-1

0

Not a major contributor of engineering ceramics

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SiC

SiO2

Si3N4

BH3

Which of the following devoice is used to measure potential difference between celctrodes.

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Polarimetre

Conductometer

Voltmeter

Photometer

Which of the following are neutral ligands.

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NH3

H2O

CO & NO

All of above

The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are.

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2,2

3 , 2

1 , 1

1 , 2

The titration involving oxidation reduction reactions is called.

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Complex titration

Simplex titration

Redox titration

Acid base titration

Which of the following detector is used in GC analysis

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Thermal conductivity detector

Flame ionization detector

Mass spectrometer

All above

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal.

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N2O3

HNO3

SO2

SOCl2

The concentration required to give a signal equal to three times the standard deviation of the baseline is called.

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Sensitivity

Detection limit

Signal to noise ratio

None of the above

Which of the following has maximum number of unpaired electrons.

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Fe3+

Fe2+

Co2+

CO3+

CIF is

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Chlorine monoflouride

Fluourine

Monochlorine fluoride

Monofluorine chloride

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

Which of the following biogeochemical cycle is not component of ecosystem.

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Carbon cycle

Potassium cycle

Oxygen cycle

Nitrogen cycle

Separation of isotopes of uranium is carried out by

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CaF2

SF6

HF

All above

Which of the following statements is not related to the decomposition phenomenon occurring in nature.

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Decomposition is due to autotrophic organisms

Decomposition involves bacteria and fungi

During decomposition organisms carry out specific reactions

Many species of decomposer are present in the biosphere

SO3 exists in form

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a -so3

b-SO3

gama SO3

All above

The process of heating to redness and then slow cooling in known as

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Tempering

Annealing

Quenching

Hardening

Which process of adsorption of hydrogen on palladium is known as.

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Syneresis

Occlusion

Diffusion

Erosion

An element having low IE and low EA is likely to belong to.

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Group IA

Group IB

Group VII A

Group VIII

Which of the following is NOT true 7 ceramic materials are.

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Hard, have high densities high compressive strength and very good thermal resistance and strength at higher temperature Silicon

Hard, have low densities high compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities low compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities' high compressive strength and very good thermal resistance and strength at higher temperature.

Which idea of envisioned the construction of nano robots

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Building nano materials atom by atom

Destruction of macromolecules to nano ones

Bothe of the above

None of the above

Glycine reacts with nitrous acid to form

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Methyl amino

Acetic acid

Zwitter ion

Glycollic acid

The most important problem regarding nano chemistry

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Elucidation of relationship between also and chemical reactivity of particle

Determination of size of particle

Determination of reactivity of particle

Determination of physical properties of nano particles.

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