Among the following, the pair in which the two species are not isostructural, is
SiF4 and SF4
IO and XeO3
BH
PF and SF6
The helical structure of protein is stabilized by
dipeptide bond
hydrogen bonds
ether bonds
peptide bonds
The dipole moment of HBr is 1.6 × 10-30 cm and inter-atomic spacing is 1 Å. The % ionic character of HBr is
7
10
15
27
The bond angle is smallest in
H2O
H2S
BeCl2
N2O
B.
H2S
The bond angle of H2S is less than H2O because S is less electronegative than H2O. BeCl2 has linear structure, hence its bond angle is 180° The N2O molecule also has linear structure with bond angle 180°. Therefore, the smallest bond angle is of H2S.
Consider the following ions:
(i) Ni2+ (ii) Co2+ (iii) Cr2+ (iv) Fe3+
(Given, at. no. Cr = 24, Fe = 26, Co = 27, Ni = 28)
The correct order of magnetic moment of these ions is
(i) < (ii) < (iii) < (iv)
(iv) < (ii) < (iii) < (i)
(i) < (iii) < (ii) < (iv)
(iii) < (iv) < (ii) < (i)