Question # 1

The concept is also known as proton donor acceptor system.

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Bronsted Lowery

Lewis

Lux Flood

Usanovich

Identify a dye which was ot originally obtained from plant source.

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Alizarin

Tyrian purple

Indigotin

Quercitrin

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

Oxytocin, a pituitary hormone to

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Amino acid

Polypeptide

Protein

Conjugated protein

The addition of Br2 to cis 2-butene produces.

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(+) 2,3 - dibromobutane only

(-) 2,3 -dibromobutane only

(+) 2,3, dibromobutane

meso-2,3, -dibromobutane

Elements of group 14

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Exhibit oxidation state of -4

Exhibit oxidation state of +4

From M3+ and M4+ ions

Form M4- and M4+ iona

The blue colour of CuSO4 disappears on adding Zn granules to it . it is because of .

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Oxidation of Cu atom

Oxidation of Zn²⁺

Oxidation Cu²⁺

Oxidation of Zn²⁺

Which of the following device is used to measure the surface tension.

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Polarimeter

Viscometer

Refractometer

Stalagnameter

In which of the following compound valency of carbon in 4 but its oxidation number is zero

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Methane

Carbon dioxide

Carbon monoxide

Formaldeyde

The most promising technique for solar production of electricity is.

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Dry cell

Battery

Solar cell

None of above

A mordants is substance which in

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Coloured

Leuco -base of a dye

Fixes dye on the fabric

All of these

Iodine is a grey black solid and its vapours are in color

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Grey

Black

Yellow

Violet

The size of quantum dot is ________________m

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5

5 x 10^-9

5 x10^-10

5 x10^-11

The oxidation state of Pt in Xe+ [Pt F6] is

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+4

+5

+6

None of these

Which librates H2 with NaOH

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B

AI

Zn

All

The soap and detergent are source of organic pollutants like.

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Glycerol

Polyphosphates

Sulphonated hydrocarbons

All of these

Which of the following methods does not give the weight average molecular weight.

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Sedimentation equilibrium

Sedimentation velocity

Light scattering

Osmotic method

The number 7.65 is rounded to.

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7.6

7.7

7.5

7.8

Permanent hard water is softened by addition of.

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Na2CO3

CaCO3

MgCO3

ZnCO3

The titration involving oxidation reduction reactions is called.

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Complex titration

Simplex titration

Redox titration

Acid base titration

Arrange the following in order of increasing boiling point.

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CH3OH < CH3Cl < RbCl < CH4

CHOH < CH4 < CH3Cl < RbCl

RbCl < CH3Cl < CH3OH < CH4

CH4 < CH3Cl < CH3OH < RbCl

Which one of the following pairs are chemically dissimilar.

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Na and K

Ba and Sr

Zr and HF

Ca and Zn

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

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Fat

Vinegar

Ethanol

Water

Which of the following ahs non zero dipole moment.

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NH3

SF6

BF3

CO2

Which of the following statement is not true with respect to the role of matter undergoing decomposition.

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Decomposed matter increase soil fertility

They provide a texture which is favorable for plant growth

Organic compounds for complexes with mineral nutrients which enhance uptake by plants.

In high concentration the decomposition product may increase the photosynthesis

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

AI Cl3 acts as a strong Lewis acid, because it is.

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A covalent compound

Readily hydrolyzed

Electron deficient

An ionic compound

In German Silver copper is alloyed with which metal.

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Zn

Ni

Ai

Zn and Ni

Which of the following compounds has highest dipole moment.

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Dichloromethane

Chloroform

Chloromathane

All above

The first noble gas compound was

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XeO3

XeF4

XeF6

Xe +[PtF6]

The range of sound pressure for uncomfortable level is.

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80 - 90 dB

100 - 120 dB

130-140 dB

All above

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