Chemistry MCQs

Page No. 116

Which of the following methods is used to estimate hydrogen in an organic compound ?


aCombustion method

✓


bDumas method

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cKjeldahls method

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dAll of the above methods are for different purposes

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View Answer Combustion method

Isotopes differ in_________________?


aproperties which depend upon mass

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barrangement of electrons in orbitals

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cchemical properties

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dall of the above

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Combustion analysis is performed to determine__________________?


aEmpirical formula

✓


bMolecular mass

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cMolecular formula

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dFormula mass

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View Answer Empirical formula

Qualitative analysis is carried out for _________________?


aidentification of elements

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bestimation of amounts of elements

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cmolar ratio of elements

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dmolar volume of elements

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Which of the following statements is wrong about isotopes ?


athey possess different mass number

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bthey possess different physical properties

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cthey possess same chemical properties

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dthey possess different position in the periodic table

✓



The mass of decimole of electrons (NA) is___________________?


a1.008 mg

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b0.184 mg

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c0.054 mg

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d5.4 mg

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View Answer 0.054 mg

Which one of the following is not the mono isotopic element ?


aarsenic

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buranium

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ciodine

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dnickel

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View Answer uranium

Which of the following terms is used for the mass of chlorine 35.5 ?


arelative atomic mass

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bmass number

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catomic weight

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drelative isotopic mass

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View Answer relative atomic mass

Size of molecule depends upon________________?


aAtomicity

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bShape of molecule

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cBoth A and B

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dDifficult to predict

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View Answer Both A and B

Avogadros number may represent_________________?


avolume of particles

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bnumber of particles

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cmass of particles

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dAll of the above

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View Answer All of the above

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