NEET
Practice Test 8
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Which molecule is planar ?

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The species in which the central atom uses sp2 hybrid orbitals in its bonding is

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    From amongst given species PH3, NH3 and SbH3 are all sp3 hybridised. Their central atom has both bond pair as well as lone pair of electrons. The lone pair occupy the fourth orbital. \(CH_{3}^{+}\) has only three pairs of electrons so it is sp2 hybridised.

Which one of the following has the regular tetrahedral structure ? (Atomic nos. : B= 5, S = 16, Ni =28, Xe = 54)

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The electronegativities of F, Cl, Br and l are 4.0, 3.0, 2.8, 2.5 respectively. The hydrogen halide with a high percentage of ionic character is

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    Ionic character follows the order HF > HCl > HBr > HI

The values of electronegativity of atoms A and B are 1.20 and 4.0 respectively. The percentage of ionic character of A- B bond is

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    Electronegativity difference is 4.0 - 1.20 =2.8 percentage ionic character is 72.24% when the electronegativity difference is 1.7, the %ionic character is approx 51%.

Which contains both polar and non – polar bonds?

The pair of species having identical shapes for molecules of both species is

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    Both XeF2 and CO2 have a linear structure.
    F — Xe — F                 O =C =O

Which of the following molecules has trigonal planar geometry?

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    BF3 is sp2 hybridised. So, it is trigonal planer.NH3,PCl3 has sp3 hybridisation hence has trigonal pyramidal shape. IF3, has sp3d hydridisation and has T-shape.

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

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N2 and O2 are converted into monoanions, \(N_{2}^{-}\)and \(O_{2}^{-}\) respectively. Which of the following statements is wrong ?

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Chemical Bonding And Molecular Structure
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