MCQ
Which among the following represents the reaction of formation of the product ?
- A${C_{(diamond)}} + {O_2}(g)\, \to \,C{O_2}(g)$
- B${S_{(diamond)}} + {O_2}(g)\, \to \,S{O_2}(g)$
- CBoth of the above
- ✓None of the above
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Which of the following contains $(2C -1e^-)$ bond

$(A)$ Kinetic energy of electron is $\propto \frac{ Z ^{2}}{ n ^{2}}$.
$(B)$ The product of velocity (v) of electron and principal quantum number (n), 'vn' $\propto Z ^{2}$.
$(C)$ Frequency of revolution of electron in an orbit is $\propto \frac{ Z ^{3}}{ n ^{3}}$.
$(D)$ Coulombic force of attraction on the electron is $\propto \frac{ Z ^{3}}{ n ^{4}}$.
Choose the most appropriate answer from the options given below :