Chemistry MCQs

Page No. 117

The sample of isotopes of an element which needs not to be vaporized in the vaporization chamber_________________?


aGas


bLiquid


cVolatile solid


dAll


View Answer Gas

Which of the following ion formation is always exothermic ?


aUni-negative


bUni-positive


cDi-negative


dDi-positive



Which one is true about isotope ?


aSame number of neutrons


bSame mass number


cSame physical properties


dSame chemical properties



Molecular ions are formed by passing______________________?


aHigh energy electron beam


b? – particle


cX-rays


dAll of the above


View Answer All of the above

Which of the following are isoelectronic species ?


aH+ H H-


bLi+ Na+ K+


cC1- Br- I


dF- Ne Na+


View Answer F- Ne Na+

1 a.m.u =__________________?


a1.6 x 10-27 kg


b1.6 x 10-24 kg


c1.6 x 10-26 kg


d1.6 x 10-28 kg


View Answer 1.6 x 10-27 kg

The properties of an element mosly corresponds to that isotope which has greater_________________?


aMass number


bAtomic mass


cRelative abundance


dall of the above


View Answer Relative abundance

For which of the following compounds the term empirical formula cannot be applied ?


aNaCl


bH2O


cCCL4


dIt can be applied to all mentioned above



When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen__________________?


alighter


bintermediate


cheavier


dare collected at same time


View Answer lighter

Isotopes of the same elements has__________________?


adifferent number of protons


bsame number of neutrons


cdifferent number of neutrons


dsame mass number (nucleon number)



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