MCQ
Sodium chloride easily dissolves in water. This is because
- AIt is a covalent compound
- BSalt reacts with water
- CIt is a white substance
- ✓Its ions are easily solvated
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$(a)\,\,{N_2}(g) + {O_2}(g) \rightleftharpoons \,\,2NO(g); $ $\Delta {H^o}\, = \,181\,\,kJ$
$(b)\,\,2C{O_2}(g)\,\,\,\, \rightleftharpoons \,2CO(g)\, + \,{O_2}(g);$ $\Delta {H^o}\, = \,566\,\,kJ$
$(c)\,\,{H_2}(g) + {I_2}(g) \rightleftharpoons \,2HI(g) ;$ $\Delta {H^o}\, = \,-9.4\,\,kJ$
$(d)\,\,{H_2}(g) + {F_2}(g) \rightleftharpoons \,2HF(g) ;$ $\Delta {H^o}\, = \,-541\,\,kJ$
(Given atomic masses of $A=64 ; B=40 ; C=32 u$ )