Question

12.which of the following reaction below must be carried out in a fume cupboard? @Abhisar @Callisto

Answer 1

1 \[Zn_{2}+2HCl(aq)~\rightarrow~ZnCl(aq)+H _{2}(g)\]
2 \[MnO _{2}(s)+4HCl(aq)~\rightarrow~MnCl _{2}(aq)+2H _{2}O(l)+Cl _{2}(g)\]
3 \[CaCO _{3}(s)+2HCl(aq)~\rightarrow~CaCl _{2}(aq)+H _{2}O(aq)+CO _{2}(g)\]

Answer 2

4 \[K _{2}S(s)+2HCl(aq)~\rightarrow~2KCl(aq)+H _{2}S(g)\]

Answer 3

A 1 and 3
B 2 and 4
C 1,2 and 4
D 2,3 and 4

Answer 4

@Abhisar

Answer 5

\[1.~Zn(s)+2HCl(aq)~\rightarrow~ZnCl _{2}(aq)+H _{2}(g)~*\]

Answer 6

@dan815

Answer 7

@Jhannybean

Answer 8

From experience: Zn + HCl can be carried out outside the fume cupboard. So can CaCO3 + HCl.

The one which gives Chlorine gas MUST be carried out in a fume cupboard as Chlorine gas is toxic

Answer 9

Hydrogen sulphide give bad egg smell, and iirc correctly, it's also toxic/poisonous. If you want to be safe, you know what to do, right?

Answer 10

Thnx a lot @Callisto