Which terms are exothermic for the formation of `NaF(s)`?
(P) `Na(g) rarr Na^(+) (g)+e^(-)`
(Q) `F(g)+e^(-) rarr F^(-)(g)`
(R) `Na^(+)(g)+F^(-)(g) rarr NaF(s)`

Which one of the following processes proceeds with the absorption of energy? F(g)+e^(-) rarr F^(-) (g) , F(g)+e^(-) rarr F^(-) (g) , O(g)+e^(-) rarr O^(-)(g) , Cl(g)+e^(-) rarr Cl^(-) (g)

In the transformation of Na(s) rarr Na^(o+) (g) , the energies involved are

In the transformation of Na(s) rarr Na^(o+) (g) , the energies involved are

Identify the type of energy change (ionization energy, energy of atomization, etc) show by each of these steps in the Born Haber cycle for potassium chloride. State with a reason whether the step is exothermic or endothermic. a ) 1//2 CI_(2)(g) rarr CI(g) " " b) CI(g) rarr CI^(-)(g) " " c) K(s) rarr K (g) d) K(g) rarr K^(+) (g) + e^(-) " " e) K (s) +1//2 CI_(2) (g) rarr KCI (s) " " f) KCI (s) rarr K^(+) (g) + CI^(-) (g)

In which of the following process maximum energy is released A) S_((g))+e^(-) rarr S_((g))^(-) B) O_((g))^(-) +e^(-) rarr O_((g))^(-2) C) S_((g))^(-)+e^(-) rarr S_((g))^(-2)

[" Find exothermic reaction : "],[" (1) "F_((g))^(-)rarr F_((g))+e^(-)],[" (2) "Be_((g))+e^(-)rarr Be_((g))^(-)],[" (3) "O_((g))+e^(-)rarr O_((g))^(-)],[" (4) "O_((g))+2e^(-)rarr O_((g))^(2-)]

Strongest reducing agent among the following is : (i) Na^(+)+e^(-) rarr N alpha_((s))-2.71 E^(Theta)//v (ii) Al^(3+)+3e^(-) rarr Al_((s))-1.66 E^(Theta)//v (iii) F_(2(g))+2e^(-) rarr 2F^(-) +2.87 E^(Theta)//v (iv) 2H_(2)O+2e^(-) rarr F_(2(g))+2OH_((g))^(-)-0.83E^(Delta)//V

What conclusion can be drawn from the following reactions about the nature of oxides? (1) 4Na(s) + O_2(g)rarr 2Na_(2)O(s); Na_(2)O(s) + H_(2)O(l) rarr 2NaOH(aq) (2) S(s) + O_2(g)rarr SO_(2)(g); SO_(2)(g) + H_(2)O(l) rarr H_(2)SO_(4)(aq)