Chemistry MCQs

Page No. 110

The molecules of CO2 in dry ice form__________________?


aIonic crystal


bCovalent crystal


cMolecular crystal


dAny type of crystal


View Answer Molecular crystal

Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?


aone / seventeen


bsixteen / seventeen


cone / three


dtwo / three


View Answer one / three

A method of separation of components from its solution using Distribution law is ___________________?


aSublimation


bCrystallisation


cSolvent extraction


dDistillation


View Answer Solvent extraction

The type of filtering media used for filtration depending upon____________________?


aNature of reactants


bNature of crucible


cNature of product


dNature of precipitate


View Answer Nature of precipitate

Water absorber used in combustion analysis is___________________?


a50% KOH


bLime water


cCaCl2


dMg (CIO4)2


View Answer Mg (CIO4)2

Which of the following set has all species isoelectronic__________________?


aF – Cl – Br


bLi+1 – Na+1 – K+1


cF – Ne – Na+


dH+ – H- – H


View Answer F – Ne – Na+

The volume occupied by 1.4g CO at S.T.P is___________________?


a22.4 dm3


b2.24 dm3


c1.12 cm3


d1.12 dm3


View Answer 1.12 dm3

Isotopes differs in______________________?


aarrangement of electrons in orbitals


bposition in the periodic table


cproperties depend upon mass


dchemical properties


View Answer chemical properties

The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?


aEthylene iodide


bEthylene bromide


cEthylene chloride


dEthylene fluoride


View Answer Ethylene bromide

Which of the following elements conduct electricity and also melts below 100°C ?


aAluminium


bSodium


cCarbon


dSulphur


View Answer Sodium

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