Question # 1

Co enzyme cna be separated from enzyme by

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Precipitation

Dalysis

Hydrolysis

Distillation

The common oxidation state of elements of group V A is.

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-3

+3

+5

Any above

When a solute is dissolved in two immiscible solvents it will distributes itself between two phases and the ratio of the concentration of the solute in two phases will be constant, This is known as.

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Starke law

Distribution law

Equilibrium law

Snell's law

Which of the following health effect is caused by cadmium.

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Hypertension

Cardiovascular problem

Kidney damage

All above

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.

Aluminum is usually extracted from

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Bauxite

Corundum

Feldepar

Alumite

1 nanometre =___________ cm

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10^-9

10^-8

10^-7

10^-6

How many varieties of commercial iron are known.

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1

2

4

3

Which of the following unit cells has least symmetry.

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Monocline

Cubic

Triclinic

Tetragona

Sulphate ores of aluminium

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Alumite

Cryolite

Fekdsper

Kaolin

An equilibrium the free energy change delta F for a reaction is.

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Maximum

Minimum

Zero

Negative

Which of the following is NOT true 7 ceramic materials are.

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Hard, have high densities high compressive strength and very good thermal resistance and strength at higher temperature Silicon

Hard, have low densities high compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities low compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities' high compressive strength and very good thermal resistance and strength at higher temperature.

The Ostwald process is the main method for the manufacture of nitric Acid in the fist step in this process is.

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Nitrogen and hydrogen react to form NH3

Ammonia is burned in O2 to generate N2 and H2O

Nitrogen and oxygen react to form NO2

Ammonia is burned with O2 to generate NO and H2O

Hybridization involves.

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Orbitals of same atom with slightly different energies.

Orbitals of different atoms, but with equal energies.

Orbitals of the same atom but with widely different energies.

Orbitals of different atoms with different energies.

The term accuracy refers to how near the observed value is to.

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Mean value

Low value

True value

Standard value

Both C and D

Visible light is just a portion of radiation emitted by atoms.Which of the following statements is not related with visible light.

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visible light is electromagnetic in nature.

It travels with the speed of light

It is a mass

The wave number of light is directly proportional to its wave length.

Which of the following species is very good oxidizing agent.

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MnO₄

H+

Zn²⁺

Fe³⁺

UV radiation from the sun causes a reaction in the atmosphere that leads to production

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Fluorides

Carbon monoxide

Sulphur dioxide

Ozone

The temperature at which the vapour pressure becomes equal to external pressure is called.

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Saturation point

Critical temperature

Consolute temperature

Boiling point

A trend which is common to elements of both the group IA and group VII A ongoing from top to bottom.

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Boiling point increases

Electron affinity increases

Oxidizing power increases

Ionization energy decrease

The pKa of acetic acid is 4.74 which implies that.

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pH of 1N solution is 4.74

At pH 4.74 the dissociation of acetic acid is maximum

At pH 4.74 half of the acetic acid molecules are dissociated in the solution.

At pH 4.74 the dissociation of acetic acid is minimum.

Which of the following is biodegradable pollutant.

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Domestic waste

DDT

Mercury salta

Aluminum foil

When steam is passed over red bot coke The product formed is

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Hydrogen and carbon dioxide

Mixture of hydrogen and carbon monoxide

Mixture of hydrogen and oxygen

Heavy hydrogen

Stainless steel contains.

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Fe + Cr+ Ni

Fe + Ni + Cu

Fe + Cr+ Cu

Cu + C + Ni

Glass obtained by placing a layer of butyral plastic with a suitable adhesive between two layers of glass and cementing them by heat and pressure is called.

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Glass wool

Safety glass

Optical glass

Jena glass

For an elementary reaction

2A + B ------------------- C + D

The molecularity of the reaction is.

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1

2+

3

4

The pH of the 0.0032 M H2SO4 is.

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3.2

4.0

2.198

1.0

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

Which of the following steps in involved in the metallurgy of aluminium.

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Purification of bauxite

Electrolytic reduction of alumina

Refining of aluminum

All above

The formula of sulphur sesquioxide

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SO4

S2O7

S2O3

SO3

If the activation energy in the forwarded direction of an elementary step is 52 kj and the activation energy in the reverse direction is 74 kj. What is the energy of reaction Delta E for this step

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22 Kj

-22 kj

52 kj

-52 kj

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