Which of the following is an electron deficient compound?

• B₂H₆

• NH₃

• C₂H₆

• CCl₄

Which of the following has zero dipole moment?

• ClF

• PCl₃

• SiF₄

• CFCl₃

The shape of water molecule according to VSEPR theory, is

• octahedral

• distorted tetrahedral

• trigonal planar

• trigonal bipyramidal

Which of the following species is paramagnetic?

• CN^-

• NO

• O${}_2^{2-}$

• CO

XeF₄ has a shape of

• spherical

• trigonal bipyramidal

• square planar

• tetrahedral

In which of the following pairs both molecules do not possess same type of hybridisation?

• CH₄ and H₂O

• PCl₅ and SF₄

• SF₆ and XeF₄

• BCl₃ and NCl₃

If H-X bond length is 2.00 Å. and H-X bond has dipole moment 5.12 x 10^-30 C-m, the percentage of ionic character in the molecule will be

• 100%

• 16%

• 18%

• 20%

(i) H—C—H angle in CH₄
(ii) Cl—B—Cl angle in BCl₃
(iii) F—I—F angle in IF₇ in a plane
(iv) I—I—I angle in I${}_3^{-}$

Increasing order of above bond angles is

• (i) < (ii)< (iii)< (iv)

• (ii)< (i) < (iii)< (iv)

• (iii)< (i)< (ii)< (iv)

• (iv)< (ii) < (i) < (iii)

• ${\mathrm{O}}_2^{2-}< {\mathrm{O}}_2^{-}<{\mathrm{O}}_2 <{\mathrm{O}}_2^{2+}$

• ${\mathrm{O}}_2^{2-}< {\mathrm{O}}_2<{\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{2+}$

• ${\mathrm{O}}_2<{\mathrm{O}}_2^{2-}< {\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{2+}$

• ${\mathrm{O}}_2 <{\mathrm{O}}_2^{2+}<{\mathrm{O}}_2^{2-}< {\mathrm{O}}_2^{-}$

240.

Which of the following is paramagnetic?

• [Ni(CO)₄]²⁺

• [Co(NH₃)₆]²⁺

• [Ni(CN)₄]^2-

• [NiCl₄]^2-