How many of the following statement(s) is (are) correct when a mixture of NaCl and $K_{2}C{r}_2{O}_7$ is gently warmed with conc. $H_{2}S{O}_4$?

1) A deep red vapour is evolved
2) The vapours when passed into NaOH solution gives a yellow solution of $N{a}_{2}Cr{O}_4$
3) Chlorine gas is evolved
4) Chromyl chloride is formed

The reactions are 
 $\begin{array}{l}4NaCl+K_{2}C{r}_2{O}_7+6H_{2}S{O}_4\to 2Cr{O}_{2}C{l}_2+4NaHS{O}_4+2KHS{O}_4+3H_{2}O\\ \left(\mathrm{Re}dvapours\right)\end{array}$
 $\begin{array}{l}Cr{O}_{2}C{l}_2+4NaOH\to N{a}_{2}Cr{O}_4+2NaCl+2H_{2}O\\ chromylyellow\\ chloridesolution\end{array}$

Dichromate oxidizes Cl^- to  Cl₂ on heating.

(Ref.Vogel's qualitative inorganic analysis P. No 204,Seventh edition)