Chemical Reacti...

Heating of ferrous sulphate crystals results in change in the colour of the crystals. This reaction is an example of:

$$2Pb \left( NO_{ 3 } \right)_{{2}{(s)}}$$ $$\overset{Heat}\longrightarrow$$  $$2 P b O_{( s )} + 4 N O _ {{ 2 }{(g)}} \uparrow + \  O _ {{ 2 }{(g)}} $$ , The above reaction is ...................

Which of the following reactions are possible? 
i) $$Mg+CuSO_4 \rightarrow MgSO_4+Cu$$
ii) $$Ca+MgSO_4 \rightarrow CaSO_4+Mg$$
iii) $$Cu+ZnSO_4\rightarrow CuSO_4+Zn$$
iv) $$Fe+MgSO_4 \rightarrow FeSO_4+Mg$$ 

$$Zn(s)+PbCl_2(aq)\rightarrow Pb(s)+ZnCl_2(aq)$$

$$ TiCl_4 +2Mg \rightarrow Ti +2MgCl_2 $$. Identify the reaction.

Which of these is a combination reaction?

Which of the following reaction is not exothermic? 

Observe the following reaction.
$$ NH_{3(g)} + HCl_{(g)} \rightarrow NH_4Cl_{(s) }$$
which of the following is a type of above reaction?

During decomposition of an activated complex:

Which of the following is not a disproportionation reaction?
 $$I. NH_4NO_3 \xrightarrow{A} N_2O+H_2O  $$
$$ II. P_4 \xrightarrow {A} PH_3 +HPO_2$$
$$ III. PCl_5 \xrightarrow {A} PCl_3 +Cl_2 $$
$$IV. IO^{\ominus}_3 \rightarrow I_2 $$