Question # 1

The azimuth or angular quantum number (i) determines the number of sob shells in a given shall. the allowed values of l for a given value ffor n are.

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1.2.3.......................

1,2,3 ..................(n-1)

0.1.2.3................(n-1)

2,4,6,..............(n-2)

The main active contaminants of uranium processing are.

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U - 235

U-238

Pu -234

All above

Suppose the activatin energy of a certain reaction is 250 kj/mol, If the rate constant at T1 =300 K is k1 and the rate constant at T2= 320 K is ks, then the reaction is ______ times faster at 320 K than at 300 K

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3 x 10^-29

0.067

525

15.0

Petrol can be saved by

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Driving at a constant and moderate speed

Ensuring correct type pressure

Switching off the engine at traffic lights

All of these

Presence of nitrogen in organic compound to tested as.

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Nitrogen gas

NH3

NO

Amide

Which of the following technique is used to separate substance based on their charge to mass ratio.

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HPLC

HPTLC

GC

Electrophoresis

Zero group of the periodic table consists of.

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Four elements

Five elements

Six elements

Eight elements

The colour of Ni2+ ion is.

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Blue

Green

deep green

Orange

The pink colour of phenolphthalen in in basic medium is due to the

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Cationic form

Anionic form

Natural form

OH- ions of the base

Helium is used for

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The preservation of food

Filling electrical transformer

Pressuring agent in rockets

All of above

CIF is

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Chlorine monoflouride

Fluourine

Monochlorine fluoride

Monofluorine chloride

Which type of the coal preferred for metallurgical coal.

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Lignite

Peat

Bituminous coal

None of these

Is a peroxy acid

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H2SO5

H2S2O6

H2SO4

H2S2O7

Which of the following statement is not correct with respect to group theory.

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Two elements of a group combine to form a third element of a group

An element combines with itself to form another element of the group.

Each element of the group obey associative law of combination

Each group element has no reciprocal

The geometry of Xe F2 is

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Triangular planar

Square planar

Linear

Trigonal bipyramidal

According to the Debye-Huckel theory of strong electrolytes, and ion moving in an atmosphere of oppositely charged ions experience a drag This effect is known as

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Aaymmetric effect

Electrophoretic effect

Inter ionic effect

Concentration effect

Which sequence of steps is correct in paper making machine

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Pressing Dyring, Flow spreader Calender stock

Flow spreader, Pressing, Prying Calender sock

Drying ,Pressing , Flow spreader, Calender stock

None of above

Which of the following elements of group 15 is a typical metal.

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P

As

Bi

Sb

Which of the following extractant is used to solid phase extraction

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Bonding of C18 chains on silica

Bonding of C20 on paper

Bonding of C18 on glass

Bonding of C20 on cellulose

According to Fajns rules, which one of following results in increased ionic nature of the covalent bond.

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Larger cation and smaller charges on anion

Larger cation and larger charge on anion

Smaller cation and smaller charge on anion

Smaller cation and larger charge on anion

Which of the following reactions does not take place with light radiation.

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Oxidation

Reduction

Polymerization

Double displacement

Which of the following state is not true with respect to copper.

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it is malleable and ductile

It is a best conductor of heat and electricity

It forms alloys easily

Moltan copper absorbed carbon dioxide

Lithum silicide reacts with concentrated hydrochlric acid to give lithium chlride along with.

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H2 and SI

Si H 4 gas

Disilane gas

Si3H8

Solid sodium chloride does not conduct electricity be cause.

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In solid NaCl, no ions are present

Solid NaCl is covalent in nature

In solid NaCl, there is no mobility of ions

In solid NaCl, there are no electrons.

The point group of XeOF4 is.

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C6v

C4h

D4h

D2h

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

The carbonate of which of the following will have highest lattice energy.

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Barium

Magnesium

Calcium

Strontium

What element is added to copper to make it extremely hard.

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Aluminum

Zinc

Lead

Tin

In the presence of dilute alkali monosaccharides undergo reversible isomerisation . The reaction known as.

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Kiliani reaction

Weermann rearrrangement

Lobry do Bruyn Van Ekenstein rearrangement

Mutarotation

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

Which of the following technique is not related to instrumental analysis.

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Optical method

Colorimetry

Polarography

Gravimetric analysis

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