The pair of gases responsible for acid rain are

Which one of the following statements is "not correct" about cationic detergents?

\[ \begin{aligned} & \text { Given } \mathrm{H}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{H}_2 \mathrm{O}(l) ; \Delta \mathrm{H}=-285 \mathrm{~kJ} \ & \mathrm{~N}_2 \mathrm{O}_5(\mathrm{~g})+\mathrm{H}_2 \mathrm{O}(l) \rightarrow 2 \mathrm{HNO}_3(l) ; \Delta \mathrm{H}=-76.6 \mathrm{~kJ} \ & \mathrm{~N}_2(\mathrm{~g})+3 \mathrm{O}_2(\mathrm{~g})+\mathrm{H}_2(\mathrm{~g}) \rightarrow 2 \mathrm{HNO}_3(l) ; \Delta \mathrm{H}=-348.2 \mathrm{~kJ} \ & \text { Calculate the } \Delta \mathrm{H} \text { of } 2 \mathrm{~N}_2(\mathrm{~g})+5 \mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{~N}_2 \mathrm{O}_5(\mathrm{~g}) \end{aligned} \] Calculate the \(\Delta \mathrm{H}\) of \(2 \mathrm{~N}_2(\mathrm{~g})+5 \mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{~N}_2 \mathrm{O}_5(\mathrm{~g})\).

The number of electrons is the valence shell of the central atom of a molecules is 8 . The molecule is

The chemical reaction that involves roasting process is

Which of the following reactions gives carboxylate ion in their reaction mixture?

Which one of the following gives sooty flame on combustion?

Which one of the following methods is suitable to separate a mixture of \(n\)-pentane and toluene?

Choose the correct statement from following.

The $\mathrm{IUPAC}$ name for the following compound is:

Fraunhoffer lines are produced by the absorption of light in

Sulphuric acid reacts with sodium hydroxide as follows : \(\mathrm{H}_2 \mathrm{SO}_4+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_2 \mathrm{SO}_4+2 \mathrm{H}_2 \mathrm{O}\) What will be the amount of sodium sulphate formed, when \(1 \mathrm{~L}\) of \(0.2 \mathrm{M}\) sulphuric acid is allowed to react with \(1 \mathrm{~L}\) of \(0.2 \mathrm{M}\) sodium hydroxide solution?

Ethyl chloride reacts with sodium ethoxide to form a compound \(A\). Which of the following reactions also yields \(A\) ?