Chemistry MCQs

Page No. 30

Oxygen and sulphur resemble in all except________________?


aElectronic conviguration of valence shell electrons


bShow allotropy


cpolymeric


dShow same oxidation state



The chemical composition of cinnabar is__________________?


aZnS


bPbS


cHgS


dFeS


View Answer HgS

Which allotropic form of phosphorous is the most stable ?


aWhite


bblack


cred


dViolet


View Answer black

All the elements in group VIA are ___________________ in nature?


ahygroscopic


bmetals


cpolymeric


dall of above


View Answer polymeric

Phosphoric acid is a weak acid and its basicity is____________________?


a1


b3


czero


d2


View Answer 3

P2O5 is a hygroscopic powder which sublimes at______________?


a260°C


b360°C


c630°C


d620°C


View Answer 360°C

Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?


aPhosphine


bPhosphorous


cWater


dPhosphorus pentoxide


View Answer Phosphine

Acetic anhydride can be obtained by treating ethyl alcohol with___________________?


aP205


bH2SO4


cBoth A and B


dPCl5


View Answer Both A and B

Allotropic form of phosphorus that is poisonous is___________________?


aWhite


bRed


cBlack


dViolet


View Answer White

Phosphorus is a Greek word and it means_________________?


aLight bearing


bFire


cImpure


dTetrahedral


View Answer Light bearing

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