Chemistry MCQs

Page No. 30

Oxygen and sulphur resemble in all except________________?


aElectronic conviguration of valence shell electrons

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bShow allotropy

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cpolymeric

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dShow same oxidation state

✓



The chemical composition of cinnabar is__________________?


aZnS

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bPbS

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cHgS

✓


dFeS

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View Answer HgS

Which allotropic form of phosphorous is the most stable ?


aWhite

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bblack

✓


cred

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dViolet

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View Answer black

All the elements in group VIA are ___________________ in nature?


ahygroscopic

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bmetals

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cpolymeric

✓


dall of above

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View Answer polymeric

Phosphoric acid is a weak acid and its basicity is____________________?


a1

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b3

✓


czero

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d2

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View Answer 3

P2O5 is a hygroscopic powder which sublimes at______________?


a260°C

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b360°C

✓


c630°C

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d620°C

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View Answer 360°C

Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?


aPhosphine

✓


bPhosphorous

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cWater

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dPhosphorus pentoxide

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View Answer Phosphine

Acetic anhydride can be obtained by treating ethyl alcohol with___________________?


aP205

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bH2SO4

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cBoth A and B

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dPCl5

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View Answer Both A and B

Allotropic form of phosphorus that is poisonous is___________________?


aWhite

✓


bRed

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cBlack

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dViolet

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View Answer White

Phosphorus is a Greek word and it means_________________?


aLight bearing

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bFire

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cImpure

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dTetrahedral

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View Answer Light bearing

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