Which of the following would have a permanent dipole moment ?

(a) BF3

(b) SiF4

(c) SF4

(d) XeF4

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In the case of alkali metals, the covalent character decreases in the order

(a) MCl > MI > MBr > MF

(b) MF > MCl >  MBr > M

(c)MF > MCl > MI > MBr

(d) MI > MBr > MCl > MF

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Which of the following two are isostructural? 

(a)XeF2, and IF2-

(b)NH3, and BF3

(c)CO32-, and SO32-

(d)PCl5, and ICl5

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Types of Bonding
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Which one of the following species does not exist?

(a) Be2+

(b) Be2

(c) B2

(d) N2

 

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Which one of the following is not paramagnetic ?

(a) NO

(b) N2+

(c) CO

(d) O2-

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In a regular octahedral molecule, MX6 the number of X-M-X bonds at 180°is

(a) 3

(b) 2

(c) 6

(d) 4

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Hybridisation
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Which of the following is not isostructural with SiCl4

(a) SCl4     

(b) SO42-

(c) PO43-

(d) NH4+

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Hybridisation
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In which of the following species the central atom has the type of hybridisation which is not the same as that present in the other three ?

(a) SF4

(b) I3-

(c) SbCl52-

(d) PCl5

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Hybridisation
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Which of the following has  --bonding ?

(a) NO3-

(b) SO32-

(c) BO33-

(d) CO32-

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Hybridisation
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In BrF3 molecule, the lone pairs occupy equatorial positions to minimise :

(a) lone pair-bond pair repulsion

(b) bond pair-bond pair repulsion

(c) lone pair-lone pair repulsion and lone pair-bond pair repulsion

(d) lone pair-lone pair repulsion

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Hybridisation
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