Which of the following molecules has three-fold axis of symmetry

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 Multiple Choice QuestionsMultiple Choice Questions

301.

Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of electrons?

  • Octahedral

  • Trigonal planar

  • Pyramidal

  • Tetrahedral


302.

The paramagnetic molecule at ground state among the following is :

  • H2

  • O2

  • N2

  • CO


303.

The following salt shows maximum covalent character:

  • AlCl3

  • MgCl2

  • CsCl

  • LaCl3


304.

Which of the following is paramagnetic ?

  • B2

  • C2

  • N2

  • F2


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305.

The trigonal bipyramidal geometry results from the hybridisation :

  • dsp3 or sp3d

  • dsp2 or sp2d

  • d2sp3 or sp3d2

  • d3p2 or d2p3


306.

The molecule having smallest bond angle is :

  • H2O

  • H2S

  • NH3

  • H2Te


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307.

Which of the following molecules has three-fold axis of symmetry ?

  • NH3

  • C2H4

  • CO2

  • SO2


A.

NH3

NHmolecule has three fold axis of symmetry because it has sp3 hybridisation but due to presence of one lone pair of electron it has pyramidal structure.


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308.

Electrons in a paramagnetic compound are :

  • shared

  • upaired

  • donated

  • paired


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309.

sp3d hybridization results in :

  • a square planar molecule

  • an octahedron molecule

  • a trigonal bipyramidal molecule

  • a tetrahedron molecule


310.

Which of the following is correct electron dot structure of N2O molecule?

  • :N=N=Ö:

  • :NN+-O....:

  • :N..=N=O....

  • :N..=N-O....


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