Question # 1

Optimum pressure in Haber's process for synthesis of Ammonia is

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100 -150 atm

200- 300 atm

350 - 450 atm

500 - 600 atm

Electrolysis is used for

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Electroplating

Refining of copper

Manufacture of caustic soda

All of the above

Crystal to diamond is.

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Ionic

Molecular

Covalent

Metallic

Gooch crucible is made of.

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Glass

Paper

Teflon

Procelain

A cell in which electric current is produced as a result of spontaneous redox reaction is called.

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Electrolytic cell

Galvanic cell

Half cell reaction

Down's cell

pH of buffer is calculated by.

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Sorenson equation

Mosley equation

Henderson equation

De broglie equation

Most of the reaction which give stable products are

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Exothermic

Endothermic

Isothermal

None of these

Carbon atom in methane in hybridized.

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sp3

Sp2

Sp

dsp3

If we want to change O₂to O₂^-1The electron is to be placed in

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Dipole Moment of H2O is.

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1.61 D

1.85 D

0.95 D

1.49 D

Whenever a reaction is endothermic, then it means that

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Heat is transferred from surrounding to the system

Heat is transferred system to the surrounding

Heat content of the product is greater than that of reactants

Heat content of the reactants is greater than the products

If the salt bridge is not used between two half cells, then the voltage

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Decreases rapidly

Decreases slowly

Does not change

Drops to zero

How many balloon of 0.25 dm3 capacity at 1 atmospheric pressure can be filled from a hydrogen gas cylinder of 5 dm3 capacity at 10 atmospheric pressure.

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50

90

180

200

What are the SI units of Van der Waal constant 'a'

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atm dm3 mol-2

atm dm6 mol-2

Nm4 mol-2

Nm mol-1

All radio active disintegration nuclear reaction are of.

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First order

Zero order

2nd order

Third order

the number of moles of CO2 which contain 8.0 g of oxygen.

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0.25

0.50

1.0

1.50

The rate of reaction

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Increase as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reactions proceeds

May decrease or increase as the reaction proceeds

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