Chemistry MCQs

Page No. 55

Radiations are absorbed in_______________?


aSpectrophotometer method

✓


bDilatometric method

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cOptical relation method

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dRefractometric method

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For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants__________________?


aSingle

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bSquare

✓


cCube

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dRaise to power four

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View Answer Square

Rate of disappearance of reactant is equal to_________________?


aRate of reaction

✓


bRate of formation of product

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cEnergy released during reaction

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dA and B

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View Answer Rate of reaction

Unit of rate of reaction is_________________?


aMoles dm-3 sec-1

✓


bMoles dm-3

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cMoles sec-1

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dMol-1 dm3 sec-1

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View Answer Moles dm-3 sec-1

Spontaneous reactions are_______________?


aModerate

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bSlow

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cFast

✓


dnot natural

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View Answer Fast

The value of activation energy is primarily determined by_______________?


aTemperature

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bEffective collision

✓


cConcentration of reactants

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dChemical nature of reactants and products

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View Answer Effective collision

The specific rate constant of a first order reaction depends on the________________?


aTime

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bConcentration of the reactant

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cTemperature

✓


dConcentration of the product

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View Answer Temperature

The rate of reaction___________________?


aIncreases as the reaction proceeds

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bDecreases as the reaction proceeds

✓


cRemains the same as the reaction proceeds

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dMay decrease or increase as the reaction proceeds

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The sequence of zones in the rotary kiln are as____________________?


adry zone burning zone decomposition zone cooling zone

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bcooling zone burning zone decomposition zone dry zone

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cburning zone cooling zone decomposition zone

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ddry zone decomposition zone burning zone cooling zone

✓



Which one of the following raw material is not present in the cement ?


alime stone

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bgypsum

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cKNO3

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diron oxide

✓


View Answer iron oxide

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