MCQ
$AgN{O_3}$ gives a red ppt. with
- A$KI$
- B$NaBr$
- C$NaN{O_3}$
- ✓${K_2}Cr{O_4}$
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Statement $I$ : Boron is extremely hard indicating its high lattice energy
Statement $II$ : Boron has highest melting and boiling point compared to its other group members.
In the light of the above statements, choose the most appropriate answer from the options given below

| Column $-1$ | Column $-2$ |
| $(A)$ Haber's process for ammonia | $(P)$ Zeolite |
| $(B)$ Oswald's process for $HNO_3$ | $(Q)$ $Fe$ |
| $(C)$ Contact processf $H_2SO_4$ | $(R)$ $ V_2O_5$ |
| $(D)$ Cracking of hydrocarbons | $(S)$ $Pt$ gauge |