Question # 1

Which one among the following is not a natural polymer?

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protein

cellulose

nylon

nucleic acid

The mono atomic gas molecules are ______ gas molecules

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Halogen

Zero

Noble

Both b and c

To cook the food at a high mountain is difficult as compared to at sea level. The reason is that:

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the temperature at the top of the mountain is low

the density of water decreases at the mountains

the boiling point of water decreases at the mountain

the hydrogen bonding in water changes with the change of height

Third structure of protein structure refers to

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Number and sequence of amino acids

Three dimensional structure of protein

Proteins formed of more than one monomer

Bending of protein molecule

The Complete oxidation of ethanol produces first Ethanal than

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Ethanal

Propanone

Ethanoic acid

Benzoic acid

SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode

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Zn has less reduction potential than hydrogen and Cu

Zn has high reductionl potential than hydrogen

and Cu

Zn is below electrochemical series than hydrogen and Cu

Zn has least tendency to lose electron

2-propanol shows-----isomerism with 1-propanol

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Chain isomerism

Positional isomerism

Metamerism

Geometrical isomerism

The scope of environmental chemistry is to study:

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Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

Which of the following is a non-crystalline solids pair

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Diamond, wood

Glass, table salt

Wood, glass

Sucrose, glass

The conversion of tertiary alcohols into alkenes in the presence of K2Cr2O7 + H2SO4 is

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Addition reaction

C-H bond cleavage

Elimination reaction

Combustion reaction

Choose an addition polymer among the following

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Terylone

Nylon 6, 6

Polystyrene

Epoxy resin

In the hydrolysis of CH₃COOC₂H₅the acid produced is

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Inhibitor

Catalyst

Auto catalyst

None of above

Which is not a method for solid waste management

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Landfill

Incinerating

Recycling

None of these

Which statement is incorrect for NICAD battery

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The electrolyte is alkali

Cd acts as anode

MnO₂acts as electrolyte

NiO₂acts as cathode

The radius of first orbit of H-atom is

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4.75 A°

3.84 A°

8.4 A°

0.529 A°

[Ti(H₂O)₆]⁺³ion absorbs colour:

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Blue

Yellow

Green

Red

Four d-orbitals contain four lobes while fifth contains only two lobes the orbital is

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dxy

dxz

dz²

dx²- y²

The reaction between fat and NaOH is called:

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Esterification

Hydrogenolysis

Fermentation

Sponification

An azeotropic mixture of two liquids boils at a lower temperature than either of them when lower temperature

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It is saturated

it shows positive deviation from Raoult's law

It shows negative deviation form Raoult's law

It is metastable

An alcohol with molecular formula C_nH_2n+1OH has a chiral carbon atom but does not react with MnO^-₄/H⁺what is the least number of carbon atoms such an alcohol could possess

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5

6

7

8

The oxides of electronegative elements are

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Basic

neutral

Acidic

Amphoteric

Which one is a nitrogen fertilizer

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Urea

Calcium sulphate

Potassium phospahte

Magnesium carbonate

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