Consider the following species :
(i) CH3^+
(ii) (C3H5)3Al
(iii) HCHO
(iv) CH4
(v) (C2H5)3N
(vi) TiCl4
(vii) CO2
(viii) SiCl4
(ix) BF3
The find out total number of species

Question

Consider the following species :
(i) CH3^+
(ii) (C3H5)3Al
(iii) HCHO
(iv) CH4
(v) (C2H5)3N
(vi) TiCl4
(vii) CO2
(viii) SiCl4
(ix) BF3
The find out total number of species which can act as Lewis acid.

Prashant Kotian · Accepted Answer

Correct answer: 7 / SPECIES ACTING AS LEWIS ACIDS ARE: CH3^+, (C3H5)3AL, HCHO, TICL4, CO2, SICL4, BF3. Step 1: The pyrosilicate anion, Si2O7^6-, is formed by joining two tetrahedral SiO4^4- units together. Step 2: This dimer shares exactly one corner oxygen atom between the two silicon atoms: 2*(SiO4^4-) - 1*(O^2-) = Si2O7^6-. Step 3: Thus, the anion is obtained when one oxygen of a SiO4^4- tetrahedron is shared with another SiO4^4- tetrahedron, matching option (b).

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