91Ó°ÊÓ

(A): Sodium ions are dischargcd in preference ro hydrogen ions at a mercury cathode. (R): Ine nature of cathode can affect the order of discharge of cations.

(A): \(\mathrm{Mg}\) gcrs oxidizcd when heating in \(\mathrm{CO}_{2}\) armosphcre. (R): \(\mathrm{Mg}\) has a strong affinity for oxygen.

(A): Anhydrous magncsium chloridc cannor be obtaincd by hearing \(\mathrm{MgCl}_{2}, 6 \mathrm{I} \mathrm{I}_{2} \mathrm{O} .\) (R): \(\mathrm{MgCl}_{2}, 6 \mathrm{H}_{2} \mathrm{O}\) is highly stable and is unaffected by heat.

(A): \(\mathrm{BcCl}_{2}\) fumes in moisr air. \((\mathrm{R}): \mathrm{BeCl}_{2}\) reacts with moisture to form \(\mathrm{HCl}\) gas.

(A): Magncsium meral burns in air ro give a whirc ash and this ash gives smell of ammonia in conracr wirh water. (R): The ash contains magnesium nitride also which is hydrolyzed by water and ammonia is evolved.

Match the following: Column I Column II A. Sorel's cement (p) \(\mathrm{MgCl}_{2}\) B. Albite (c) \(\mathrm{MgO}\) C. A salt of carnalirc (r) \(\mathrm{NaA} \mathrm{ISi}_{3} \mathrm{O}_{8}\) D. Glauber's salt (s) \(\mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O}\)

Match the following: Column I Column II \Lambda. Efflorescert (p) \(\mathrm{NaOH}\) B. Deliquescen (q) \(\mathrm{KOll}\) C. Fusion mixture (r) \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\) D. Washing soda (s) \(\mathrm{Na}_{2} \mathrm{CO}_{3}, 1011 \mathrm{O}\)

Match the following: Column I Column II A. \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) (p) \(\mathrm{SO}_{2}\) absorber B. \(\mathrm{Na}_{-1} \mathrm{SO}_{3}\) (c) Detergent C. NaOI I (r) Glass D. \(\mathrm{NaOCl}\) (s) Bleach

Match the following: Column I Column II A. Duralumin (p) Calcium B. Magnalium (q) Magresium C. Elccron meral (r) Aluminium D. Dolomite (s) Zinc

Match the following: Column I Column II (Compounds) \(\quad\) (Composition) A. Black ash (p) \(\mathrm{K}_{2} \mathrm{CO}_{3}\) B. Washing soda (q) Cas C. Nitrolim (r) \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) D. P carl ash (s) \(\mathrm{CaCN}_{2}+\mathrm{C}\)