Question # 1

Are used as water repellents

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Carbides

Silicon

Silicones

Silicates

RNA is involved int eh synthesis of

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Protein

Nucleic acid

Carbohydrates

Fats

Aluminum occurs in nature as.

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Native

Combined form

Both native and combined

Free

Alumina is not used as

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Refractory material

A medium in chromatography

An abrasive

A White pigment

Which of the following is soluble in water.

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AgF

AgCl

AgBr

Ag I

The overall energy change during the Cannot cycle to.

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Equal to zero

Equal to Q

Equal to W

Maximum

Which show maximum number of oxidation states in 3d series.

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Mn

Ni

Co

Zn

The spectral line obtained when an electron jumps from n = 6 to n= 3 belongs to.

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Balmer series

Layman series

Paschen series

Bracket series

Which of the following specie is stronger acid than formic acid, HCOOH, in aqueous solution.

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CH3COOH

NH+4

H2SO-3

H4P2O7

The intensity of magnetization produced per unit strength of the applied magnetic field is called magnetic susceptibility., which of the following statements is not related with this phenomenon.

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Confirmation of structure of given compound

Complex storeochemistry

Diamagnetic nature of molecules

Paramagnetic nature of molecules.

The electrolytic method super passes all other methods due to.

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Furity

Cheapness

Easy available

All above

Which of the following statements is not true with reference to ionic conductors.

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Ionic conductance is due to movement of the ions

It involves the transfer of matter

It involves oxidation reduction reactions

It decreases with rise in temperature.

Which of the following class of compounds follow the criteria of aromatically.

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The compounds must have high degree of unsaturation

they must have the property to undergo addition reactions

They must have the property to undergo substitution reactions

They must have the ability to sustain an induced current in NMR

The technique which involves measurement of the changes in conductance of the solution by employing high frequency alternating current in known as.

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Potentiomerty

Polarography

Oscillometry

Conductomerty

An ionic compound X + Y - is most likely to be formed if

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Ionization enthalpy of X is high electron gain ethalpy of Y is low

Ionization enthalpy of X is high electron gain enthalpy of Y is high

Ionization enthalpy of X is low,electron gain enthalpy of Y is low

Ionization enthalpy of X is low electron gain enthalpy of Y is high

Fullerene or bucky ball is made up of ________ carbon atoms.

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100

20

75

60

The ionization energy of N is more than that of oxygen becasue.

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Nitrogen has half filled p orbitals

Nitrogen atom is smaller in size than oxygen atom

Nitrogen contains less number of electrons

Nitrogen is less electronegative

Which of the following halide has lowest melting point.

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NaCl

NaF

NaBr

NaI

The term accuracy refers to how near the observed value is to.

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Mean value

Low value

True value

Standard value

Both C and D

What is the raw material of sugar industry.

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Sugar cane

Potato

Carrot

Sugar heat

Both A and C

The quantum yield of a Photo chemical reaction in

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Always less than unity

Always equal to unity

Always greater than unity

Can have any value > 0 depending on the reaction

The change in the concentration of the reactant of product per units time is called.

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Order of the reaction

Melecularity of the reaction

Rate of reaction

None of the above

Naphthalene balls are obtained from

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Carbon

Coke

Coal Tar

All of above

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 process is involved in getting back nitrogen into atomosphere.

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Nitrification

Denitricication

Ammonification

All above

Which among the following is insoluble in water.

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LiOH

KOH

NaOH

RbOH

Which of the following properties does not depend upon the numeb rof solute particles.

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Elevation in B.P.

Osmotic pressure

Depression in F.P.

Boiling point of the solvent

Which of the following statement is not correct.

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The element with highest IE belongs to group 18

In each period the element with lowest IE belongs to group I

In each period the element with highest IE is a noble gas

In the second period as we move from left to right, ionization energy increases reqularly.

The process in which ore is heated generally in the presence of air, at temperature below their melting points is called.

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Calcination

Roasting

Fourth floatation

besemerization

Which of the following instruments is used to measure the optical activity.

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Refractometer

Conductivity meter

Polarimeter

Torsion meter

The specific gravity of H2SO4 is

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1.37

1.84

1.17

1.57

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