Question # 1

Which of the following statement is not correct with reference to cell constant.

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The dimensions of cell constant is cm-1

It is used to determine the specific conductance

It is measured with KCl solution

Specific conductance does not vary with concentration.

'A line, a point or a plane about which a symmetry operation is performed, is known as.

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Symmetry operation

Symmetry element

Reflection

Inversion

Which of the following does not have an a,b, unsaturated carbonyl group.

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Androsterone

Oestrone

Testosterone

Progesterone

The number of optically active compounds in the isomers of C3H5Br3 is.

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1

2

3

4

The colloidal solution of arsenic sulphide prefers to absorb

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NO3

K+

S2-

H+

The correct order of ionic radii for the following ions is.

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S²- < P^3- < Cl- < K+

Cl- > S2+ > P3- > k+

K+ > Cr > S2+ > P3-

P3+ > S2 > Cl - > K+

A salt solution is treated with chloroform drops.Then it is shaken with chlorine water, chloroform layer become violet solution contains.

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NO2 ion

NO3 ion

Br ion

I- ion

The concept is also known as electron pair donor acceptor system.

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Bronsted Lowery

Lewis

Lux -Flood

Usanovich

How many oxygen atoms lined up in a now would fit in a one nanometer speace.

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None an oxygen atoms is bigger than 1 nm

One

Seven

None of the above

Which ionization Potential in the following equations involves the greatest amount of energy.

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Na = Na+ + e

K = K+ +e

C2+ = C3+ +e

Ca+ = Ca2+ + e

Chemical compounds which are added to reduce to reactivity of glass are called.

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Formers

Modifiers

Stabilizers

None of these

The change in the concentration of the reactant of product per units time is called.

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Order of the reaction

Melecularity of the reaction

Rate of reaction

None of the above

Which of the following statements is not true with respect to atomic spectroscopy.

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Atoms are simplest form of matter

Atoms cannot rotate or vibrate as molecules do

Only electronic transitions within atoms take place

Band spectra are observed

Used for sterilizationof drinking water

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F

Br

Cl

I

Which of the following compound does not following octet rule.

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CS2

PBr3

IBr

Br F3

Ca2+ is isolelectronic with.

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Mg2+

Kr

Ar

Na+

Which of the following cells is used to produce electricity from chemical reaction

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Electroytic cell

Galvanic cell

Voltaic cell

Fuel cell

Both C and D

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware, etc. when mixed wiht cold conc. H2SO4

In a system , when the chemical potential of each component is the same for all phases. the equilibrium is said to be in

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Metastable equilibrium

Thermal equilibrium

Composition equilibrium

Mechanical equilibrium

The process of identifying the component present in a sample is called.

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Quantitative analysis

Qualitative analysis

Volumetric analysis

Gravimetric analysis

The equilibrium constants Kp and Kc are related as

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Kp = Kx Pdelta n

K p= Ks/P delta n

Ks = Kp (RT)delta n

Kx = Kp (P/RT) delta n

Which of the following statement represent disadvantages of sanitary landfill

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Public opposition

Uneconomical

Health hazard

All above

The fluoride tooth paste contains

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SnF2 and Sn2P2O7

NaF

CaF2

None of these

The chief ore of aluminium is.

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Cryolite

Bauxite

Kaolin

Carnalite

Major principle underlying the sustainability of natural ecosystems is that they run on.

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Electric energy

Solar energy

Wind energy

None of the above

Which of the following element is usually determined by flame photometry.

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Li

Na

K

All above elements

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

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Grey

Black

Yellow

Violet

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

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

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+4

+5

+6

None of these

In Ostwald's process of manufacturing nitric acid a mixture of ammonia gas with air is mantained with ratio.

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1 : 4

1 :3

1: 8

1 : 10

Colour in transition metal compounds in attributed to

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Small sized metal ions

Absorption of light in UV region

Complete ns sub shell

incomplete (n-1) sub shell

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