Chapter 10: Problem 87
Slaked lime reacts with chlorine to give (a) \(\mathrm{CaCl}_{2}\) (b) \(\mathrm{CaO}\) (c) \(\mathrm{Ca}(\mathrm{OCl})_{2}\) (d) \(\mathrm{CaCO}_{3}\)
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Which of the following statements is correct? (a) Sodium carbonate decomposes on heating (b) Sodium bicarbonate is more soluble in water than potassium bicarbonate. (c) Sodium when heated with excess of \(\mathrm{O}_{2}\) gives peroxide. (d) Lithium halides are highly ionic in nature.
Match the column 1 with column II and mark the appropriate choice. \begin{tabular}{|l|l|l|l|} \hline \multicolumn{2}{|c|} { Column I } & \multicolumn{2}{c|} { Column II } \\\ \hline (A) & Quick lime & (i) & Setting fractured bones \\ \hline (B) & Plaster of Paris & (ii) & A constituent of chewing gum \\ \hline (C) & Slaked lime & (iii) & Manufacture of bleaching powder \\ \hline (D) & Limestone & (iv) & Manufacture of dyestufis \\ \hline \end{tabular} (a) \((A) \rightarrow(i),(B) \rightarrow(i v),(C) \rightarrow(i i),(D) \rightarrow\) (ii) (b) \((\mathrm{A}) \rightarrow(\mathrm{iv}),(\mathrm{B}) \rightarrow(\mathrm{i}),(\mathrm{C}) \rightarrow(\mathrm{iii}),(\mathrm{D}) \rightarrow\) (ii) (c) \((A) \rightarrow(i i),(B) \rightarrow(\) iii \(),(C) \rightarrow(i),(D) \rightarrow\) (iv) (d) \((A) \rightarrow(i i i),(B) \rightarrow(i i),(C) \rightarrow(i v),(D) \rightarrow(i)\)
Match the column I with column II and mark the appropriate choice. \begin{tabular}{|l|l|l|l|} \hline \multicolumn{2}{|c|} { Column I } & \multicolumn{2}{|c|} { Column II } \\\ \hline (A) & \(\mathrm{Na}^{+}\) & (i) & Chlorophyll \\ \hline (B) & \(\mathrm{K}^{+}\) & (ii) & Bones and teeth \\ \hline (C) & \(\mathrm{Ca}^{2+}\) & (iii) & Regulating flow of water across cell membrane \\ \hline (D) & \(\mathrm{Mg}^{2+}\) & (iv) & Activation of enzyme in this cell fluids \\ \hline \end{tabular} (a) (A) \(\rightarrow\) (i), (B) \(\rightarrow\) (iii), (C) \(\rightarrow(\) ii), (D) \(\rightarrow\) (iv) (b) \((\mathrm{A}) \rightarrow(\mathrm{iv}),(\mathrm{B}) \rightarrow(\mathrm{iii}),(\mathrm{C}) \rightarrow(\mathrm{ii}),(\mathrm{D}) \rightarrow(\mathrm{i})\) (c) (A) \(\rightarrow(\mathrm{i}),(\mathrm{B}) \rightarrow(\mathrm{ii}),(\mathrm{C}) \rightarrow(\mathrm{iii}),(\mathrm{D}) \rightarrow\) (iv) (d) \((\mathrm{A}) \rightarrow(\mathrm{iii}),(\mathrm{B}) \rightarrow(\mathrm{iv}),(\mathrm{C}) \rightarrow(\mathrm{ii}),(\mathrm{D}) \rightarrow(\mathrm{i})\)
A solution of a compound \(X\) in dilute \(\mathrm{HCl}\) on treatment with a solution of \(\mathrm{BaCl}_{2}\) gives a white precipitate of a compound \(Y\) which is insoluble in coac. \(\mathrm{HNO}_{3}\) and conc. \(\mathrm{HCl}\). Compound \(X\) imparts golden yellow colour to the flame. yellow colour) What are compounds \(X\) and \(Y ?\) (a) \(X\) is \(\mathrm{MgCl}_{2}\) and \(Y\) is \(\mathrm{BaSO}_{4}\)(b) \(X\) is \(\mathrm{CaCl}_{2}\) and \(Y\) is \(\mathrm{BaSO}_{4}\) (c) \(X\) is \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) and \(Y\) is \(\mathrm{BaSO}_{4}\) (d) \(X\) is \(\mathrm{MgSO}_{4}\) and \(Y\) is \(\mathrm{BaSO}_{4}\)
Which of the following statements is not true about alkali metals? (a) All alkali metals form oxo salts such as carbonates, sulphates and nitrates. (b) The basic character of oxides increases down the group. (c) Carbonates and sulphates of lithium are stable and their stability decreases down the group. (d) Solubility of carbonates and sulphates increases down the group.
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