Question # 1

Which of the following is not a property of aluminium.

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An efficient electrical conductor

A low density compared to other metals

Is amphoteric

Toxic to humans

Vet days are generally applied to the fabric in the form of.

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Mordants

Leuco base

Oxidised base

Dispersed dyes.

Which of the following gas form weakly acidic sulphurous acid

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SO2

SO3

NO2

NO

Which of the following acid radical gives chromyl chorate test.

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F-

I-

Cl-

Br-

The electronic configuration of sodium (Z=11)

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1s2, 2s2, 2p4

1s2, 2s2, 2p6, 3s2 , 2p5

1s2, 2s2, 2p6, 3s1

1s2, 2s2, 2p6, 3s2

Which of the following elements has the highest value of second ionization energy.

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Lithum

Beryllium

Boron

Magnesium

Is a peroxy acid

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H2SO5

H2S2O6

H2SO4

H2S2O7

Which one of the following set of raw material is most suitable for manufacture of urea.

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CH4N2 and CO2

H2CO2 and H2O

H2O N2 and H2

H2O N2 AND KCl

Diamond and carbon are the _________ forms of carbon

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Isotropic

amorphous

Allotropic

Isomeric

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

The entropy change accompanying any physical or chemical transformation approaches zero as T approaches zero. This statement refers to.

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Helmholtz law

Third law of thermodynamics

Second law of thermodynamics

Nernat heat theorem

Which of the following statement is not correct with reference to cell constant.

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The dimensions of cell constant is cm-1

It is used to determine the specific conductance

It is measured with KCl solution

Specific conductance does not vary with concentration.

Which of the following is an azo dye.

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Congo red

Rhodamine B

Ertythroein

Paraosaniline

Thermocouples have been constructed from

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Chromel ve elumel

Copper vs platinum

Both

None

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

Acid rain is caused due to increase in the concentration of _______ in the atmosphere

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Ozone and dust

CO2 and CO

SO3 and CO

SO2 and NO2

If a chemical reaction in equilibrium is subjected to a change the reaction tends to more in such a direction that the effect of the change would be neutralized This is a statement of.

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Law of mass action

Le Chatlier's principle

Henery's law

Correspondence principle

Aluminum is an active metal but does not corrode as iron does because.

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Ai does not react with O2

A protective layer of Al2 O3 forms on the metal surface

AI is harder to Oxidize than is Fe

Aluminium has a high tensile strength

The nature of bonds in compounds of carbon and silicon is mostly

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Covalent

Electrovalent

Metallic

Both A and B

The correct order of acid strength is.

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HIO4 > HBrO4 > HCIO4

HCIO4> HBrO4 > HIO4

HBrO4 > HIO4 > HCIO4

HBrO4 > HCIO4 > HIO4

The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called.

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Ionic bond

Covalent bond

Mettalic bond

Co ordinates bond

The relative error is usually expressed as

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Parts per ten

Parts per one

Parts per hundred

Botha C and D

The maximum oxidation shown by managanese is.

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+2

+7

+4

+5

The number of significance figures in the number 80.7 is.

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1

2

3

4

Which of the following materials is not suitable as adsorbent for chromatography.

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Silica gel

Activated charocal

Alumina

Calciu7m chloride

Poise is a unit of.

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Refractive index

Optical activity

Fluidity

Viscosity

Alnico is an alloy containing how many percent nickel.

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10%

14%

18%

22%

In terms of the amount of the substance adsorbed per gram of the adsorbent (x/m), and pressure p of the gas, the Freudlich adsorption isotherm is represented as.

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x/m = k/pⁿ

x/m = kpⁿ

p = k (x/m)ⁿ

x/m = (k/p)ⁿ

Which of the following has highest ionization energy.

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Oxygen

Argon

Barium

Caealum

In extraction of iron, the furnace charge consists of iron ore, coke and limestone. The function of limestone is to act as.

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An oxidation agent

A reducing agent

Flux

Slag

A group that causes deepning of the colour is known as

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Bathchromic

Hypsochromic

Hypochromic

Hyperchromic

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