Which of the following is a displacement reaction?

Which of the following statements about the given reaction are correct?
\(
3 \mathrm{Fe}(\mathrm{s})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{Fe}_{3} \mathrm{O}_{4}(\mathrm{~s})+4 \mathrm{H}_{2}(\mathrm{~g})
\)
(i) Iron metal is getting oxidised
(ii) Water is getting reduced
(iii) Water is acting as reducing agent
(iv) Water is acting as oxidising agent

Which of the following are exothermic processes?
(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)

\(
\mathrm{MnO}_{2}+4 \mathrm{HCl} \rightarrow 2+2 \mathrm{H}_{2} \mathrm{O}+\mathrm{Cl}_{2}
\)
Identify the substance oxidized in the above . equation.

When Ag is exposed to air it gets a black coating of

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

\(
\text { When S02 gas is passed through saturated solution of } \mathrm{H} 2 \mathrm{~S} \text { , which of the following reaction occurs? }
\)

Name the products formed when iron filings are heated with dilute hydrochloric acid

\(
\mathrm{Pb}+\mathrm{CuCl}_{2} \rightarrow \mathrm{PbCl}_{2}+\mathrm{Cu}
\)
The above reaction is an example of

In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?