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Chapter 1: Problem 27

Dalton's law of partial pressures cannot hold good for (a) \(\mathrm{NO}_{2}+\mathrm{O}_{2}\) (b) \(\mathrm{H}_{2}+\mathrm{Cl}_{2}\) (c) \(\mathrm{CO}_{2}+\mathrm{O}_{2}\) (d) \(\mathrm{NH}_{3}+\mathrm{He}\)

Short Answer

Expert verified
The gas pairs that do not follow Dalton's Law of Partial Pressures due to chemical reactions are: (a) \(\mathrm{NO}_{2}+\mathrm{O}_{2}\) (b) \(\mathrm{H}_{2}+\mathrm{Cl}_{2}\)

Step by step solution

01

Identify the chemical reactions

In this step, we need to identify whether any of the given pairs of gases undergo a chemical reaction when mixed. (a) \(\mathrm{NO}_{2}+\mathrm{O}_{2}\) (b) \(\mathrm{H}_{2}+\mathrm{Cl}_{2}\) (c) \(\mathrm{CO}_{2}+\mathrm{O}_{2}\) (d) \(\mathrm{NH}_{3}+\mathrm{He}\)
02

Establish the reactions

Here, we establish the reactions that are possible between the given gas pairs: (a) The reaction between \(\mathrm{NO}_{2}\) and \(\mathrm{O}_{2}\) can give rise to \(\mathrm{NO}\) and \(\mathrm{O}_{3}\): \(\mathrm{NO}_{2}+\mathrm{O}_{2}\rightleftharpoons\mathrm{NO}+\mathrm{O}_{3}\) (b) The reaction between \(\mathrm{H}_{2}\) and \(\mathrm{Cl}_{2}\) can result in the formation of \(\mathrm{HCl}\): \(\mathrm{H}_{2}+\mathrm{Cl}_{2}\rightarrow2\mathrm{HCl}\) (c) There is no possible reaction between \(\mathrm{CO}_{2}\) and \(\mathrm{O}_{2}\): No reaction. (d) There is also no possible reaction between \(\mathrm{NH}_{3}\) and \(\mathrm{He}\): No reaction.
03

Identify the gas pairs violating Dalton's Law

Based on our findings in Step 2, let's identify which of the given gas pairs do not follow Dalton's Law of Partial Pressures due to the occurrence of chemical reactions: (a) \(\mathrm{NO}_{2}+\mathrm{O}_{2}\) - Violates Dalton's Law since there is a reaction between these two gases. (b) \(\mathrm{H}_{2}+\mathrm{Cl}_{2}\) - Violates Dalton's Law due to the reaction between these gases. (c) \(\mathrm{CO}_{2}+\mathrm{O}_{2}\) - Follows Dalton's Law since there is no reaction between these gases. (d) \(\mathrm{NH}_{3}+\mathrm{He}\) - Follows Dalton's Law due to no reactions between these gases.
04

Final answer

Thus, based on the analysis of the given gas pairs, we conclude that Dalton's law of partial pressures cannot hold good for the following gas pairs: (a) \(\mathrm{NO}_{2}+\mathrm{O}_{2}\) (b) \(\mathrm{H}_{2}+\mathrm{Cl}_{2}\)

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Most popular questions from this chapter

Fill in the blanks. The volume of \(\mathrm{CO}_{2}\) liberated at \(\mathrm{STP}\) is on thermal decomposition of \(84 \mathrm{~g}\) of sodium bicarbonate.

Select the correct alternative from the given choices. \(20 \mathrm{cc}\) of a hydrocarbon on complete combustion gave \(80 \mathrm{cc}\) of \(\mathrm{CO}_{2}\) and \(100 \mathrm{cc}\) of \(\mathrm{H}_{2} \mathrm{O}\) at \(\mathrm{STP}\). The empirical formula of that compound is (a) \(\mathrm{C}_{2} \mathrm{H}_{5}\) (b) \(\mathrm{C}_{2} \mathrm{H}_{6}\) (c) \(\mathrm{C}_{3} \mathrm{H}_{8}\) (d) \(\mathrm{C}_{4} \mathrm{H}_{10}\)

State whether the following statements are true or false. The rate of diffusion of methane is double the rate of diffusion of sulphur dioxide gas.

Match the entries given in Column A with appropriate ones in Column \(B\). $$ \begin{array}{|l|l|l|} \hline \begin{array}{l} \text { A. Empirical formula of } \\ \text { glucose } \end{array} & \text { () } & \begin{array}{l} \text { a. Less intermolecular } \\ \text { forces } \end{array} \\ \hline \begin{array}{l} \text { B. Percentage of carbon } \\ \text { in methane } \end{array} & \text { () } & \text { b. } 75 \% \\ \hline \text { C. Ideal gas } & \text { () } & \text { c. } 17.6 \% \\ \hline \text { D. High critical } & \text { () } & \begin{array}{l} \text { d. } \text { Large } \\ \text { intermolecular } \\ \text { forces of attraction } \end{array} \\ \hline \begin{array}{l} \text { E. Percentage of } \\ \text { hydrogen in } \\ \text { ammonia } \end{array} & \text { () } & \text { e. } \mathrm{CH}_{2} \mathrm{O} \\ \hline \begin{array}{l} \text { F. } \text { Empirical formula of } \\ \text { oxalic acid } \end{array} & \text { () } & \text { f. } \mathrm{CHO}_{2} \\ \hline \end{array} $$

Select the correct alternative from the given choices. The ratio by mass of sulphur and oxygen in \(\mathrm{SO}_{2}\) is (a) \(1: 2\) (b) \(2: 1\) (c) \(1: 1\) (d) \(1: 4\)
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