Question # 1

Pick out the incorrect statement for transition metals.

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Cu+ is not a transition metal ion

Transition metals do not exhibit variable oxidation states

Transition metal ions are coloured

Transition metals and majority of their compounds are paramagnetic

The stabilization of the dispersed phase in a lyophobic sol is due to

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Liking for the dispersion medium

The surface tension of the medium

The formation of an electrical layer between the two phases

The viscosity of the medium

Ethylene belongs to.

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C_2v group

D_2h group

C₂ group

D_ah group

Monomer of natural rubber is

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1,3-Butadiene

2-Methyl -1,3-butadiene

1,2 -Butadiene

1,3 - Pentadiene

Law of octaves was proposed by

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Lother meyer

D.I.Mendeleev

J.A.R. Newlands

J.W. Dobereiner

Alumina is not used as

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Refractory material

A medium in chromatography

An abrasive

A White pigment

The number 7.43 is rounded to

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7,44

7.4

7.45

7.3

Which of the following polymers is chlorinated.

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Orlon

Neoprene

Dacron

None of these

Graphite is a good conductor of electricity because is.

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Has sp2 hybridized carbon stoms

Has free electrons

Is crystalline

Has free atoms

Which of the following has the greatest metallic character.

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Na

Mg

Al

Si

Pesticide residues appear in which of the following foods.

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Milk

Fruit

Fish

Vegetables

All above

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

The correct order of second ionization potential of carbon , nitrogen, oxygen and fluorine is.

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C > N > O > F

O > N > F > C

O > F > N > C

F > O > N > C

When a concentrated solute of an electrolyte is diluted.

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Its specific conductance increases

Its equivalent conductance decreases

The specific conductance decreases and equivalent conductance increases

Both specific and equivalent conductance increase

Which of the following energy is trapped by the autotrophic organisms.

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Mechanical energy

Electrical energy

Radiant energy

Electronic energy

The fraction of the total current carried to an ion is called itss.

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Ionic mobility

Transport number

Limiting ionic conductance

None of these

Nano particles may interact with the support to be.

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Partially oxidized

Partically reduced

Both a and b

None

CIF is

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Chlorine monoflouride

Fluourine

Monochlorine fluoride

Monofluorine chloride

The colloidal solution of arsenic sulphide prefers to absorb

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NO3

K+

S2-

H+

Ozone layer of stratosphere requires protection from indiscriminate use of.

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Fungicides, insecticides, bactericides and medicines

Aerosols and high flying jets

Atomic explosions and industrial wastes

Weather ballons

An ionic compound X + Y - is most likely to be formed if

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Ionization enthalpy of X is high electron gain ethalpy of Y is low

Ionization enthalpy of X is high electron gain enthalpy of Y is high

Ionization enthalpy of X is low,electron gain enthalpy of Y is low

Ionization enthalpy of X is low electron gain enthalpy of Y is high

Carbylamine reaction proceeds via the intermediate formation of.

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Alkyl isocyanide

Chloride ion

Alkyl carbonion

Dichloro methylene

Ammonium nitrate is sold as a mixture with

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Soda Ash

Lime stone

Zinc

None of above

If a chemical reaction in equilibrium is subjected to a change the reaction tends to more in such a direction that the effect of the change would be neutralized This is a statement of.

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Law of mass action

Le Chatlier's principle

Henery's law

Correspondence principle

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

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Formers

Modifiers

Stabilizers

None of these

When a large block of silicon wafer is reduced to smaller component and hence non material is formed this approach is called.

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Bottom up

Top down

Left to right

Right to left

Group VA of the periodic table consist of elements.

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3

4

5

6

The law which relates the solubility of a gas to its pressure is called.

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Raoult's law

Nernst law

Ostwald's law

Hennery's law

For a given mass of a gas if temperature increase

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Pressure and volume remain Constance

Volume increases provided pressure is kept constant

Pressure decreases provided volume is constant

Both volume and pressure decrease

Which of the following physical property forms the basis of radio chemicals methods of analysis.

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Absorption of light

Emission of light

Radioactivity

Thermal conductivity

The dyes which are produced on the fibre in suit by reactions are known as.

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Mordant dyes

Fast dyme

Ingrain dyes

Disperse dyes

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