Chemistry MCQs

Page No. 48

Metallic characters of alkali metals_____________________?


aIncrease down the group


bDecrease down the group


cNo regular trend


dRemain same



Addition of 2nd electron to a uni negative ion is always____________________?


aExothermic


bEndothermic


cData is insufficient


dUnpredictable


View Answer Endothermic

Ionization energy depends upon____________________?


aNuclear charge


bAtomic size


cShielding effect


dI.E depends upon all of the above and nature of orbital



Deuterium reacts with oxygen to form________________?


aHard water


bHeavy water


cSoft water


dWater gas


View Answer Heavy water

The property which increases upto group IV-A then decreases on wards_______________?


aIonization energy


bAtomic radii


cMelting & boiling points


dAtomic volume



Which discovery caused a revision in the periodic law as stated by Mendeleev ?


aLocation of nucleus by Rutherford


bAtomic number by Moseley


cX-rays by Roentgen


dNatural radioactivity by Henry Bacquerel.



Which one of the following is not a periodic property ?


aMelting point of elements


bBoiling point of elements


cIonization energy of elements


dCoordination number of ions



In which of the following pairs are elements belonging to the same group ?


aBoron & Beryllium


bNitrogen & Phosphorous


cMagnesium & Aluminium


dGallium & Helium



Hydrogen resembles with carbon because of having________________?


aSame number of electrons in the valence shell


bSimilar physical state


cRemarkable reducing properties


dHomovalent (show same valency)



Amphoteric exides are those which possess ____________ properties?


aAcidic


bBasic


cAcidic and basic


dNeutral and acidic


View Answer Acidic and basic

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