`NH_(3),H_(2)O,CH_(4),HF,BH_(3),BeH_(2),SiH_(4),H_(2)S,PH_(3)`How many of the above compounds are electron precise.

SiH_(4)+NaOH +H_(2)O to X +3H_(2) X in the above reaction is

(i) State the formula and name the conjugate base of each of the following species : (a) H_(3)O^(+) (b) HSO_(4)^(-) (C ) NH_(4)^(+) (d) HF (e ) CH_(3)COOH (f) CH_(3)NH_(3)^(+) (g) H_(3)PO_(4)(h)H_(2)PO_(4)^(-). (ii) State the formula and name the conjugate acid of each of the following species : (a) OH^(-) (b) HPO_(4)^(2-) (C) H_(2)PO_(4)^(-) (d) CH_(3)NH_(2) (e) CO_(3)^(2-) (f) NH_(3)(g) CH_(3)COO^(-) (h) HS^(-)

The correct statements among (a) to (d) are (a). Saline hyddrides produces H_(2) gas when reaction with H_(2)O . (b). Reaction of LiAlH_(4) with BF_(3) leads to B_(2)H_(6) (c). PH_(3) and CH_(4) are electron rich and electron precise hydrides, respectively. (d). HF and CH_(4) are called as molecular hydrides.

(a) Arrange the following compounds in an increasing order of basic strengths in their aqueous solutions: NH_(3), CH_(3)NH_(2), (CH_(3)) _(2)NH, (CH_(3)) _(3)N . (b) Complete the following reaction equations: (i) RCONH_(2) underset(H_(2)O)overset(LAH)(to) (ii) C_(6)H_(5)N_(2)Cl + H_(3)PO_(2) + H_(2)O to (iii) C_(6)H_(5)NH_(2) + Br_(2) (aq) to

Among the complex ions, [Co(NH_(2)-CH_(2)-CH_(2)-NH_(2))_(2)Cl_(2)]^(+),[CrCl_(2)(C_(2)O_(4))_(2)]^(3-),[Fe(H_(2)O)_(4)(OH)_(2)]^(+),[Fe(NH_(3))_(2)(CN)_(4)]^(-),[Co(NH_(2)-CH_(2)-CH_(2)-NH_(2))_(2)(NH_(3))Cl]^(2+) and [Co(NH_(3))_(4)(H_(2)O)Cl]^(2+)] , the number of complex ion (s) that show(s) cis-trans isomerism is

underline(S)F_(4)+H_(2)O to H_(2)SO_(3)+HF