1.

Which combination is correct for Be metal

Answer»

<P>(I)(II)(R)
(II)(iii)(Q)
(III)(iv)(P)
(IV)(i)(S)

Solution :(I)No colour in FLAME test (Be)
BeO is Amphoteric oxide in nature
`(BeH_2)_n`

electron deficient and polymeric
(II)Violet colour in flame test ( K Metal)
`KO_2`(POTASSIUM super oxide ) is orange yellow
`KO_3`(Potassium ozonide) is orange-red solid
(III)yellow colour in flame test (NA metal)
`Na_2CO_3`(sodium carbonate ) is manufactured by solvay process
microcosmic salt `to Na(NH_4)HPO_4. 4H_2O`


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