Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (x), (y) and (z), the sum of (x), (y) an (z) is :

Two monomers in maltose are :

The increasing order of the atomic radii of the following elements is :-
(a) C (b) O
(c) F (d) Cl
(e) Br

Among (a) – (d) the complexes that can display geometrical isomerism are :
(a) [Pt(NH₃)₃Cl]⁺
(b) [Pt(NH₃)Cl₅]^–
(c) [Pt(NH₃)₂Cl(NO₂)]
(d) [Pt(NH₃)₄ClBr]²⁺