Engineer & Medical

d and f Block Elements question bank (Chemistry)

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Q1.

A paper dipped in a dil. $H_2SO_4$ solution of '$X$' upon treatment with $SO_2$ gas turns into green. The compound '$X$' is :

(A)
KI-starch
(B)
$KMnO_4$
(C)
$Pb(CH_3COO)_2$
(D)
$K_2Cr_2O_7$
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Q2.

The number of valence electrons present in the metal among $\mathrm{Cr}, \mathrm{Co}, \mathrm{Fe}$ and Ni which has the lowest enthalpy of atomisation is

(A)
$8$
(B)
$9$
(C)
$6$
(D)
$10$
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