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D and F Block Elements question

2003 · Shift 0 · Q28

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JEE Main
Chemistry
D and F Block Elements
2003 · Shift 0 · Q28

D and F Block Elements question

2003 · Shift 0 · Q28

JEE MainChemistryD and F Block ElementsMCQ+4 / −1

A red solid is insolvable in water. However it becomes soluble if some

K{\rm I}

is added to water. Heating the red solid in a test tube results in liberation of some violet colored fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is :

A
$Hg{{\rm I}_2}$
B
$HgO$
C
$P{b_3}{O_4}$
D
${\left( {N{H_4}} \right)_2}C{r_2}{O_7}$

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