Question # 1

Which among the following elements has the highest value of IE.

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Mg

Na

Ca

Sr

Enfleurage process is used to extract the essential oils from

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Back of plant

Seeds of plant

Leaves of plant

Flowers of plant

The property measured in TGA is

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Change in weight

Rate of change in weight

Heat envolved and absorbed

Change of temperature.

Zeigler Natta catalyst is.

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Pt/PtO

TiCl4/Al(C2H5)3

Pt/Rh

Pt

Which of the following carbides reacts with H2O to form propane.

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Al4C3

CaC2

SiC2

Sic

The noble gas used or treatment of cancer is

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Helium

Argon

Radon

Krypton

What combination of elements has high electrical resistance high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating.

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Aluminium bronze

Nichrome

Hastelloy

None of above

Which of the following technique is most sanative one.

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Photomerty

AAS

Flame photometry

Flourimetry

Which of the following statement is not related to collision theory.

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Molecules must collide with each other to do a chemical reaction

Molecules must posses a minimum amount of energy

Molecules must have proper orientation

Collision theory is applicable to liquid only.

Arrangement of peptide chains of protein in spec to form helix stucture is referred to as.

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Primary structure

Secondary structure

Tertiary structure

Quaternary structure

The number of significance figures in the number 80.7 is.

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1

2

3

4

Which of the following analytical method is based on the rotation of light ratiation

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Refractomerty

Polarimetry

Interformetry

Polarography

The percentage of nitrogen in ammonium sulphate is__________%

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27

21

23

19

PCl5 is an example of hybridization

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d sp³

d2 sp2

sp2

sp3

The simplest formula of a compound containing 50% of element X

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XY2

XY

X2Y

None of the abvoe

The order in O2+ is

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1.0

1.5

2.0

2.5

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

The dipole moments of the given species are such that.

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BF3 > NF3 > NH3

NF3 > BF3 > NH3

NHE > NF3 >BF3

NH3 > BF3 > NF3

The chemical method of separation in which the analytes to be separated are distributed between two phases, one of which is stationary phase while the other moves in a definite direction This technique is known as.

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Electrophoreals

Chromatography

Solvent extraction

Catachreals

The unit cell having dimensions, a = b=c, alpha = beta= gama not equal 90 ^o is known.

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Cubic

Trigonal

Tetragonal

Monoclinic

The bonding of transition metal complex was not well understand until the pioneer work of.

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Ps JAISWAL

GS MANKU

BR thukral

Alfred Weriner

The expected specific wastes of textile industry is

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Cloth residue

Fibre residue

Dyes

All above

Separation of isotopes of uranium is carried out by

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CaF2

SF6

HF

All above

What is a measure of rigidity?

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Stiffiness

Jardmess

Strength

Modulus of elasticity

Which of the following compounds is electrovalent in nature.

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SO2

ICI

KBr

CHI3

In which paper some additive is not added.

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Carbon paper

Filter paper

Glazed paper

Art paper

Alkyl cyanide and alkyl isocyanides are

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Tautomers

Metamers

Functional isomers

None of the above

Has the highest value of electronegativity

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F

Cl

Br

I

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

Which of the following is not a component of flame photometer.

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Pressure regulator and flow meter

The atomizer

The burner

Hallow cathode lamp

The base which in not present in DNA is

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Adenine

Guanine

Thymine

Cytosine

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