19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Resonance structures can be written for:
Deviation of O─O bond length in ozone molecule from the normal bond length seems as
Resonating structure are represented through which type of arrows?
The structure which represents the molecule’s structure more accurately is called
Whenever a single Lewis structure cannot describe a molecule accurately, a number of structures with almost similar energy, position of nuclei, bonding and non-bonding pairs of electrons are taken as the canonical str…
The O─O bond length in ozone molecule is:
In the given resonating structures, which one is called resonance hybrid?
Match the bond type given in Column I with the bond length in column II and choose the correct option from the codes given below Column I Column II A. O-H 1. 154 pm B. C-C 2. 133 pm C. C-O 3. 96 pm D. C=C 4. 143 pm Co…
Which of the following is correct : (a) Bond order stability bond length bond enthalpy (b) Stability bond order bond length bond enthalpy
The bond order in H2, O2 and N2 is respectively
If the bond enthalpy of O2, N2 and H2 are 498 kJ mol-1 , 946 kJ mol-1 and 435.8 kJ mol-1 respectively. Choose the correct order of decreasing bond strength.
Given the correct order of initials T or F for the following statements. Use T if statements is true and F if it is false: (I) CH P CF is non-polar and CH P CF is polar molecule (II) CH P CH bond angles a…
Which of the following molecules have same bond order? H2, He2, C2 and O2
Accordingly MO theory (a) O is paramagnetic and bond order is greater than O2. (b) Ois paramagnetic and bond order is less than O2. (c) Ois diamagnetic and bond order is less than O2. (d) Ois diamagnetic and bond orde…
Which of the following compounds have the same no. of lone pairs with their central atom? (I) XeF (II) BrF (III) XeF (IV) H S (V) Triple Methylene
Which molecule has regular geometry? (I) SnCl (II) NH (III) PCl (IV) SF
Using MO theory, predict which of the following species has the shortest bond length? (a) O (b) O (c) O (d) O Ans. (d) Sol. As we know, Bond length 1/bond order. In option A, Ohas bond order 2.5 In option B, Ohas bo…
Which one of the following is not paramagnetic?
The number of anti-bonding electron pairs in O molecular ion on the basis of molecular orbital theory is (atomic no. of O is 8):
The ion that is isoelectronic with CO is:
The ground state electronic configuration of valence shell electrons in nitrogen molecule (N2) is written * , , 2 , 2p 2p x y z s s p .Hence,the bond order in nitrogen molecule is :
Which of the following is paramagnetic? (a) O
Take NA as the number of Anti-bonding molecular orbitals and NB as the number of Bonding molecular orbitals. The molecule is stable when NA ____________ NB. a) is greater than b) is equal to c) is less than d) is grea…
Which one of the following species is diamagnetic in nature ? (a) H (b) H (c) H (d) He
Which of the following have identical bond order? (I) CN– (II) O2 (III) NO+ (IV) N2