A pink coloured salt turns blue on heating. The presence of which cation is most likely ?
A pink coloured salt turns blue on heating. The presence of which cation is most likely ?
- [JEE MAIN 2015]
- A
$Co^{2+}$
- B
$Cu^{2+}$
- C
$Zn^{2+}$
- D
$Fe^{2+}$
Similar Questions
For the following Assertion and Reason, the correct option is
Assertion : For hydrogenation reactions, the catalytic activity increases from Group $5$ to Group $11$ metals with maximum activity shown by Group $7-9$ elements.
Reason : The reactants are most strongly adsorbed on group $7-9 $ elements.
For the following Assertion and Reason, the correct option is
Assertion : For hydrogenation reactions, the catalytic activity increases from Group $5$ to Group $11$ metals with maximum activity shown by Group $7-9$ elements.
Reason : The reactants are most strongly adsorbed on group $7-9 $ elements.
- [JEE MAIN 2020]
Which of the following ions is coloured
Which of the following ions is coloured
Which element is alloyed with copper to form bronze
Which element is alloyed with copper to form bronze
Many transition metals form interstitial compounds. The characteristics of these interstitial compounds are
$(I)$ They have high melting points, higher than those of pure metals
$(II)$ They are very hard
$(III)$ They retain metallic conductivity
$(IV)$ They are chemically more reactive than the pure metals
Many transition metals form interstitial compounds. The characteristics of these interstitial compounds are
$(I)$ They have high melting points, higher than those of pure metals
$(II)$ They are very hard
$(III)$ They retain metallic conductivity
$(IV)$ They are chemically more reactive than the pure metals
The catalytic activity of the transition metals and their compounds is ascribed to their
The catalytic activity of the transition metals and their compounds is ascribed to their