Which of the following imparts green colour to the glass?

$NaCl$ reacts with conc. $H_2SO_4$ and $K_2Cr_2O_7$ to give reddish fumes $(B)$,which react with $NaOH$ to give yellow solution $(C)$. $(B)$ and $(C)$ respectively are:

Which of the following melts in boiling water?

Match Column $A$ with Column $B$:

Column $A$	Column $B$
$(1) \ NiCl_2 \cdot 6H_2O$	$(a) \ \text{Pink}$
$(2) \ Co(NO_3)_2 \cdot 6H_2O$	$(b) \ \text{Colorless}$
$(3) \ FeCl_3$	$(c) \ \text{Blue}$
$(4) \ CuSO_4 \cdot 5H_2O$	$(d) \ \text{Green}$
	$(e) \ \text{Yellow}$

Determine the correct $(T)$ and incorrect $(F)$ statements from the following:
$(a)$ In the titration of $C_2O_4^{2-}$ with $KMnO_4$,$C_2O_4^{2-}$ acts as an oxidizing agent.
$(b)$ $KMnO_4$ is a strong oxidizing agent.
$(c)$ In $Cr_2O_4^{2-}$,the $O-Cr-O$ bond angle is $120^o$.
$(d)$ The standard electrode potential for the reaction $Cr_2O_7^{2-} + 14H^+ + 6e^- \to 2Cr^{3+} + 7H_2O$ is $E^o = -1.33 \ V$.

Which of the following statements is incorrect?