Question # 1

Primary structure of protein refers to

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Amino acid sequence

Arrangement of peptide chains

Orientation of amino acids

Whether is has a or b helix in space structure.

The process of extracting a metal in pure form its ores is known as.

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Crushing

Grinding

Dressing

Metallurgy

The ease of hydrohalogenation of alkyl halide with alcoholic KOH is.

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3^o > 2^o > 1^o

3^o < 2_o <1^o

3^o > 2^o < 1^o

3^o < 2 ^o > 1^o

Which of the following is not a true characteristics of a catalytic reaction.

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The amount and chemical composition of the catalyst remains unchanged after the reaction

The catalyst does not intiate a chemical reaction

The reaction in which product also act as catalysis are called autocratically reactions.

The catalyst shifts the equilibrium position of a reaction in a favorable direction

In Dumas method, the volume of the gas collected is equivalent to which of the following gases set free from the compound.

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Ammonia

O2

N2

NO

Which of the following techniques involves ion exchange phenomenon.

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Size exclusion chromatography

Ion exchange chromatography

GLC

HPLC

The electronegativity of the following elements increases in the order.

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C,N, Si, P

N, Si, C,P

Si, P, C, N

P, Si, N, C

A molecule MX4 has a square planar shape, The number of non bonding pairs of electrons around M is .

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2

1

0

3

Which of the following statement is incorrect about rock salt type

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It has for arrangement of Na+

Na+ and Cl- ions have coordination number of 6:6

A unit cell of NaCl metals have rock salt type structure.

None of them

A colloidal system in which a liquid is dispersed in a solid is called a/an

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Emulsion

Sol

Gel

Precipitate

Which of the following adsorption indicator is used for any of the halides at pH.

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Fluorescein

Eosin

Thorin

Rhodamine 6 G

Which of the following potassium fertilizers are more useful for horticultural crops tobacco and potatatoes.

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KNO3

KCl

HNO3

H2SO4

The reciprocal of the coefficient of viscosity in called.

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Density

Specific gravity

Fluidity

Conductance

In glass making the whole combination of ingredients is called a.

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Gangue

Batch

Mixture

None of these

AlCl3 fumes in air because of.

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Hydrolysis

Dehydration

Hydration

Oxidation

Which of the following statements is not true for both B and Al

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They burn in oxygen to give oxides at high temperature

Their halides are Lewis acids

They combine with nitrogen to form nitrides

They react with HCl to form chlroides.

Sodium silicate is ued

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In fire proofing of wood and textiles

As a preservative of eggs

As a furniture polish

All above

In the reaction RCO2Na + Na OH (CaO) ______ RH, we eliminate carboxylate group as.

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CO2

Na2CO3

-CO

CaCO3

______ is used for Annealing

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Klin

Batch

Converter

Oven

The bromine produced on commercial scale may contain impurities of.

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Water

Chloride

iodine

All above

Disease caused by eating fish found in water contaminated with industrial waste having mercury is.

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Minamata disease

Bright's disease

Hashimoto's disease

Osteoaclerosis

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

Which of the following analytical method is used for the separation of dissolved components from solutions.

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Chromatography

Dialysis

Solvent extraction

Distillation

Which of the following configuration is associated with biggest jump between second and third IE.

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1s2, 2s2, 2p2

1s2, 2s2, 2p6, 3s1

1s2,2s2,2p6, 3s2

1s2, 2s2,2p6

Which of the following process is involved in nitrogen flotation

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Non symmetric fixation of nitrogen

Fixation by soil bacteria

Fixation by yeast

Fixation by blue green algae

All above

What is abuckyball

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A carbon molecule

Nickname for Mercedes -Benz's futuristic concept car (CIII)

Plastic explosives nanoparticle (C4)

Concrete nanoparticle with a compressive strength of 20 nanonewtons(C20)

Which configuration has lowest potential energy.

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Eclipsed

Staggered

Skew

All have same energy

Conductometry is based on

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Electric current

Electrical potential

Absorbance

Electrical conductance

Pick out the incorrect statement for XeF4

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XeF4 disproportionate violently with water

It is used as fluorinating agent

It has octahedral structure for geometry

It oxidizes I to I₂

Which of the following salt is water insoluble.

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K2SO4

Na2SO4

BaSO4

None of abvoe

To increase the life of filament and to low the heat conductivity a mixture in filled in electric bulb.

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Ar & N2

Ar & Kr

Kr & N2

Xe & N2

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