The percentage of p-character in the orbitals forming P-P bond in

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 Multiple Choice QuestionsMultiple Choice Questions

521.

Assertion : NF3 is a weaker ligand than N(CH3)3.

Reason : NF3 ionizes to give F- ions in aqueous solution.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


522.

Assertion: All the hydrogen atoms in CH4=C=CH2 lie in one plane.

Reason : All the carbon atoms in its are sp2 hybridized.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


523.

The structure of IF5 can be best described as :

  • None of these


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524.

The percentage of p-character in the orbitals forming P-P bond in P4 is :

  • 25

  • 33

  • 50

  • 75


D.

75

Each P atom in P4 is sp3 hybridised , hence the percentage ofs and p character is 25% and 75% .


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525.

Bond dissociation energy of CH4 is 360 kJ/mol and C2His 620 kJ/mol. Then bond dissociation energy of C-C bond is

  • 170 kJ/mol

  • 50 kJ/mol

  • 80 kJ/mol

  • 220 kJ/mol


526.

Total number of antibonding electrons present in O2 will be

  • 6

  • 8

  • 4

  • 2


527.

In BF3, the B - F bond length is 1.30Å, when BF3 is allowed to be treated with Me3N, it forms an adduct, Me3N BF3, the bond length of B - F in the adduct is

  • greater than 1.30 Å

  • smaller than 1.30 Å

  • equal to 1.30 Å

  • none of these


528.

A double bond connecting two atoms .There is a sharing of :

  • 2 electrons

  • 1 electron

  • 4 electrons

  • All electrons


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529.

Structure of (SiO4)4- ion is :

  • tetrahedral

  • square planar

  • octahedral

  • planar triangular


530.

The linear molecule is :

  • CH3

  • C2H2

  • NH3

  • H2O


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