Which of the following would have a permanent dipole moment ?
1. BF3
2. SiF4
3. SF4
4. XeF4
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In the case of alkali metals, the covalent character decreases in the order
1. MCl > MI > MBr > MF
2. MF > MCl > MBr > MI
3. MF > MCl > MI > MBr
4. MI > MBr > MCl > MF
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Which of the following two are isostructural?
1. XeF2, and IF2-
2. NH3, and BF3
3. CO2, and SiO2
4. PCl5, and IF5
Difficulty Level:
Which one of the following species does not exist?
1.
2. Be2
3. B2
4. N2
Difficulty Level:
Which one of the following is not paramagnetic ?
1. NO
2.
3. CO
4.
Difficulty Level:
In a regular octahedral molecule, MX6 the number of X-M-X bonds at 180is
1. 3
2. 2
3. 6
4. 4
Difficulty Level:
Which of the following is not isostructural with SiCl4?
1. SCl4
2. SO42-
3. PO43-
4. NH4+
Difficulty Level:
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 ?
1. SF4
2.
3.
4. PCl5
Difficulty Level:
Difficulty Level:
In BrF3 molecule, the lone pairs occupy equatorial positions to minimise :
1. lone pair-bond pair repulsion
2. bond pair-bond pair repulsion
3. lone pair-lone pair repulsion and lone pair-bond pair repulsion
4. lone pair-lone pair repulsion
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