Question # 1

The electronegativity of phosphorus is.

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3.0

2.1

2.0

1.9

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

Which of the following chloride is soluble in hot water.

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Hg2Cl2

AgCl

PbCl2

All above

Select the correct IUPAC name for [FeF4(OH)2]-

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Diaquatrafluoriron (III) ion

Diaquateratrafluoriferrate (III) ion

Diaquatertrafluoroiron (I)

None of these

According to Henry's Law. the mole fraction of a gas (x) dissolved in a solvent is related to the pressure of the gas.

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x = k/p

x = p/k

x = k

p = k/x

Carbon dioxide content in atmosphere is

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0.0034%

0.034 %

0.34 %

3.4 %

Petroleum is formed from

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Domestic animal

Organisms in sea

Wild animals

All above

Fluorine does not show variable oxidation state because of.

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its high electronegativity

Its small sixe

low dissociation energy of F-F bond

Non availability of d-orbitals

Which of the following does NOT react with sodium hydroxide solution.

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Fat

Vinegar

Ethanol

Water

Variable electrovalency is due to the following reasons.

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Unstable configuration of core

Inset electron pair effect

All of above

None of above

Sulphur can exist in

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One phase

Two phase

Three phase

Four phase

Metal are generally elements

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Electronegative

Electropositive

Neutral

None of the above

In which of the following group, each member given a positive iodoform test.

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Methanol, ethanol, propanone

Ethanol, isopropyl alcohol, methanol

Ethanol, ethanal, isopropyl alcohol

Propanal 2-propanol, propanone

Conductometry is based on

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Electric current

Electrical potential

Absorbance

Electrical conductance

Chemical and physical properties of metal nano particles of atoms were observed to change periodically depending upon

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Number of atoms in a particle

Shape of particle

type of organization

All of the above

Which property is not exhibited by carbon in its compounds.

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Forming bounds to other carbon atoms

Formation multiple forms

Exhibiting allotropic forms

Forming compounds with coordination number beyond four

Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine.

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2,4 Dinitrophenyl hydrazine

Nitrous acid

Benzoyl chlride

None of these

Chief source of water and soil pollution in

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Mining of ores

Thermal power plant

Agro industry

All the above

Which of the following a -amino acid is not capable of exhibiting optical isomerism.

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Glycine

Leucine

Arginine

Alanine

An explosive

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Nitroglycerine

Trinitrotoluene

Fluorine perchlorate

All above

The noble gases which does not I do not form any clathrates is.

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He

Ne

Argpm

Both He and Ne

Which element among the following cannot exhibit variable electronvalency

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₂₉Cu

₅₀Sn

₂₅ Mn

₃₈ Sr

Chromium is found in nature in the the form of.

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Oxides

Silicates

Borates

Sulphides

The common ligands can be arranged in order of their increasing splitting power to cause d-orbitals splitting. This series is called as.

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Electro-chemical

Spectro -chemical

Physico-chemical

Spectro -electrical

Which of the following gas is lightest.

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Dihydrogen

Helium

Dinitrogen

Dioxygen

In order to understand the nature of H , bond the theory has been suggested.

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Electrostatic approach

Molecular orbital approach

Valance bond approach

All the above approaches

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.

The pair of molecules or ions having identical geometry is.

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BCl3, PCl3

BF3, NH3

CHCl3, CCl4

SiCl4, CCl4

What refers to the deterioration of material by oscillatory relative motion of small amplitude between two solid surfaces in a corrosive environment?

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Stray current corrosion

Microbiologicla corrosion

Fretting corrosion

None of these

Which of the following statement is not related with industrial ecology.

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Study of interactions between human activities and its environment

Industrial ecology seeks to optimize the total industrial materials cycle from virgin material to finished product

Industrial impacts on the environment

Economic system are viewed in isolating from their surrounding

For covalent bond to form between two atoms A and B

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Transference of electrons must take place from A to B

A pair of electrons of A is shared by both A and B

A and B contribute equal no. of electrons for mutual sharing by A and B

One of the atom A or B must already have octet of electrons.

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