The d- and f- B...

$$AgCl$$ and $$NaCl$$ are colourless. $$NaBr$$ and $$NaI$$ are also colourless but $$AgBr$$ and $$AgI$$ are coloured. This is due to:

$$ Ti^{2+}$$ is purple while $$ Ti^{4+} $$ is colorless,because:

A green mass is formed in the charcoal cavity test when a colorless salt (X) is fused with cobalt nitrate (X) may contain

In the dichoromate dianion:-

In the dichromate dianoin:

Increasing basic properties of $$ TiO_2$$, $$ZrO_2$$ and $$HfO_2 $$ are in order. 

In context of the lanthanoids , which of the following statements is not correct ?

One heating ammonium dichromate, the gas evolved is: 

A solution on treatment with $$NH_3$$ turns blue, it contains:

Hg is found in nature as HgS because :