Consider the following species:
(i) `CH_(3)^(+)`
(ii) `(C_(3)H_(5))_(3)Al`
(iii) `HCHO`
(iv) `CH_(4)`
(v) `(C_(2)H_(5))_(3)N`
(vI) `TiCl_(4)`
(vii) `CO_(2)`
(viii) `SiCl_(4)`
(ix) `BF_(3)`
the find out total number of species which can act as Lewis acid.

Consider the following species: (C_(3)H_(5))_(3)Al Find out total number of species which can act as Lewis acid.

Predict which out of the following species are planar. (i) NH_(4)^(+) (ii)CH_(3)^(+)(ii)SF_(4)(iv)OF_(2)(v)H_(2)O

Which out of the following has the highest boiling point ? (i) C_(2)H_(5)OH " "(ii) C_(2)H_(5)Br" "(iii) CH_(3)OH (iv) C_(3)H_(6)" " (v) CH_(3)OCH_(3).

The order of decreasing stability of the following carbanions is (i) (CH_(3))_(3)C^(-) (ii) (CH_(3))_(2)CH^(-) (iii) CH_(3)CH_(2)^(-) (iv) C_(6)H_(5)CH_(2)^(-)

There are some species given below. (i) O_(2)^(+) (ii) CO (iii) B_(2) (iv) O_(2)^(-) (v) NO^(+) (vi) He_(2)^(+) (vii) C_(2)^(2+) (vii) CN^(-) (ix) N_(2)^(-) total number of species which have fractional bond order.

Pick out the isoelectronic structures from the following (i) CH_(3)^(+) , (ii) H_(3)O^(+) (iii) NH_(3) , (iv) CH_(3)^(-)

Find the the valency factor for following acids (i) CH_(3)CO OH " " (ii) NaH_(2)PO_(4) " " (iii) H_(3)BO_(3)

Consider the following species: CF_(4),GeH_(4),BCl_(3),AlBr_(3),H_(2)O,PH_(3),PCl_(5),CO_(2),CH_(4) and calculate value of (x-y)^(2) : Where, x: Total number of species which can act as only lewis acid. y: total number of species which can act as lewis acid as well as lewis base.

Consider the following species: CF_(4),GeH_(4),BCl_(3),AlBr_(3),H_(2)O,PH_(3),PCl_(5),CO_(2),CH_(4) and calculate value of (x-y)^(2) : Where, x: Total number of species which can act as only lewis acid. y: total number of species which can act as lewis acid as well as lewis base.

Which of the following molecules behave as electrical dipoles ? (i) C Cl_(4) (ii) CHCl_(3) (iii) BF_(3) (iv) H_(2)O (v) BeF_(2) (vi) NH_(3)