Which among the following species have bond order zero?
A. `F_2^(2-)`
B. `Ar_2`
C. `He_2^+`
D. `H_2^+`
1 Answers
Among the following, the species with the highest bond order is-
Correct Answer - C (A) `O_(2)`,B.O=2 (B) `F_(2)`, B.O=1 (C) `O_(2)^(+)`B.O=2.5 (D) `F_(2)^(-)` B.O=0.5
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The correct order of increasing bond angles in the following triatomic species is
Correct Answer - D N on `NO_(2)^(+)` is sp-hybridized , therefore, its bond angle is `180^(@)`. Both NO and `NO_(2)^(-)`, on the other hand, are `sp^(2)`-hybrisized. In `NO_(2)^(-)`, there is one...
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Other factors being constant which bond order is expected to correspond to shortest bond length
Correct Answer - A More is bond order, shorter will be the bond length `("B.O."prop 1/(B.L.))`
2 Answers 2 views
Which among the following have bond order 2.5?
Correct Answer - C,D B.O. of `N_2^(+)=(N_b-N_a)/2 =(9-4)/2=2.5` B.O. of `O_2^(+)=(N_b-N_a)/2 =(9-4)/2.5` (Both are isoelectronic with 16 electrons each)
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Out of the following which pentadiens shows double bond character between `C_(2) -C(3)` bond although it appers to be a single bond
Correct Answer - B Due to delocalisation of `pi` electrons `C_(2)-C_(3)` bond acquired double bond character.
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Give reasons : (i) `PCl_(5)` is more volatile than `PCl_(3)`. (ii) O-O bond has lower bond dissociation enthalpy than S-S bond. (iii) `F_(2)` is stron
(i) In `PCl_(5)` molecule, P atom is present in higher oxidation state `(+5)` than in `PCl_(3)` molecule in which P atom is in `(+3)` oxidation state. Therefore, `PCl_(5)` is more...
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Assertion : Si-Si bond is stronger than Si-O bond. Reason: Silicon form Si-Si bond easily.
Correct Answer - D Si-O bond is stronger than Si-Si bond and `p pi-d pi` bonding between silicon atoms is not possible due to its larger size.
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The bond order between Ni-C bond in `Ni(CO)_(4)` is :
Correct Answer - C In the nickel carbonyl , there is a synergic bonding interaction between NI and CO. As a result, there is an increase in the strength of Ni-CO...
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The heat of combustion of ethene gas is 330 Kcal `"mol"^(-1)` calculate `gtc=clt` bond energy (in kcal/mol) assuming that bond energy of C-H bond is 9
Correct Answer - `B.E_((C=C))=112 Kcal//mol` `CH_2=CH_2(g)+3O_2(g)to2CO_2(g)+2H_2O(l)` `:.-330=[2xx(94.2)+2(-61)]-[DeltaH_f^@C_2H_4]:.DeltaH_f^@(C_2H_4)=19.6 Kcal mol^(-1)` `:. 2C(s)+2H_2(g)toCH_2=CH_2(g),DeltaH_f=19.6` `because DeltaH_("Reaction")=2DeltaH_("atm" ( C))+4DeltaH_("atm"(H))-4B.E._((C=C))` 19.6=2x150+4x51.5-4x93.6-`B.E._((C=C))` `B.E._((C=C))=112` Kcal/mol
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Match the following and choose the correct option given below (a) `N_(2)toN_(2)^(+)` (p) bond order increases (b) `N_(2)toN_(2)^(-)` (q) bond order de
Correct Answer - B (a)`N_2=sigma1s^2 sigma^**1s^2 sigma2s^2 sigma^**2s^2 pi2p_x^2 =pi2p_y^2 sigma2p_z^2` B.O.`=(10-4)/2=3` , n=0(D) `N_2^(+)=sigma1s^2 sigma^(**)1s^2 sigma2s^2 sigma^** 2s^2 sigma^** 2s^2 pi2p_x^2 = pi 2p_y^2 sigma2p_z^1` B.O.=`(9-4)/2=2.5` , n=1(P) (b)`O_2^+=sigma1s^2 sigma^**1s^2...
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