The bond length in hypothetical molecules A 2- B 2- C 2 and D 2 are given- Which of the following will have lowest bond enthalpy-A- D - D -267 pmB- C - C -228 pmC- A - A -74 pmD- B - B -144 pm

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Saturated and Unsaturated Hydrocarbons

The bond leng...

Question

The bond length in hypothetical molecules A₂, B₂, C₂ and D₂ are given. Which of the following will have lowest bond enthalpy?

D-D = 267 pm

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C-C = 228 pm

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A-A = 74 pm

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B-B = 144 pm

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a^{2} - b^{2}, b^{2} - c^{2}, c^{2} - d^{2}

a, b, c, d

{(a - c)}^{2} + {(c - b)}^{2} + {(b - d)}^{2} - {(d - a)}^{2}

If a, b, c, d are in G.p., prove that :

(i) $(a^{2} + b^{2}), (b^{2} + c^{2}), (c^{2} + d)^{2}$ are in G.P.

(ii) $(a^{2} - b^{2}), (b^{2} - c^{2}), (c^{2} - d)^{2}$ are in G.P.

(iii) $\frac{1}{a^{2} + b^{2}}, \frac{1}{b^{2} + c^{2}}, \frac{1}{c^{2} + d^{2}}$ are in G.P.

(iv) $(a^{2} + b^{2} + c^{2}), (a b + b c + c d), (b^{2} + c^{2} + d^{2})$

(b - c)^{2} + (c - a)^{2} + {(d - b)}^{2} = (a - d)^{2}

{(b - c)}^{2} + {(c - a)}^{2} + {(d - b)}^{2} = {(a - d)}^{2}

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