Chemical Bonding and Molecular Structure – Chemistry| NEET Online Mock Test|

Number of 90^o angle is BrF₅?

The incorrect statement regarding resonance is/are

Lattice energy of an ionic solid depends upon

Which of the following single bond is of highest bond enthalpy value ?

Intermolecular attractive forces vary in the order

1. Water < alcohol < ether
2. Water > alcohol > ether
3. Alcohol > water < ether
4. Ether > water > alcohol

Choose the correct statement

1. C₂ has no π-bonds as per MOT
2. C-O bond length in CO⁺ is less than that in CO
3. OC₂ has a bond angle lower than SCI₂
4. NF₃ has a pπ- dπ bond

The electronegativity of H and Cl are 2.1 and 3.0 respectively. The correct statement about the nature of HCI is

The number of bonding electrons in N₂⁺ and antibonding electron pairs in O₂^2- respectively are

CIF₃ has which of the following shape?

Both BF₃ and NF₃ are covalent compounds. BF₃ is a nonpolar compound but NF₃ is polar. The reason for it is

1. Boron is a solid but nitrogen is gas
2. Atomic size of boron is smaller than nitrogen
3. Nitrogen is more electronegative than boron
4. BF₃ is trigonal planar but NF₃ is pyramidal

The geometry of CO₂ and PCl₅ molecule respectively are

The maximum number of 90° angles between bond pair-bond pair of electrons is observed in

1. sp³ hybridisation
2. sp³d hybridisation
3. dsp² hybridisation
4. sp³d² hybridisation

Which of the following species has the shortest bond length

1. O₂²⁺
2. O₂^-
3. O₂^2-
4. O₂⁺

The sum of the number of lone pairs of electrons on the central atom in BrF₅ and S₄ is

The bond order of C - O bond in CO₃^2- is

Which of the following molecules will have the same number of σ and π electrons?

1. N₂
2. CO₂
3. CH₃CN
4. C₂H₂

Which of the following is the correct order of dipole moments?

1. H₂O>NH₃>NF₃
2. CO₂>H₂O>NH₃
3. CCl₄<PCl₅<BCl₃
4. H₂O<NH₃<NF₃

The correct increasing order of bond angles in the following species is

1. BCI₃ <  NH₃ < PCl₃
2. NH₃ < CH₄ < BCl₃
3. NH₄⁺ < BCl₃ < BeCl₂
4. Both (2) and (3)

Which of the following has the highest lattice enthalpy?

1. CsCl
2. CaF₂
3. Csl
4. BaF₂

Which of the following is correctly matched regarding the hybridization of the central atom?

1. SO₂ : sp³
2. SO₄^2- : sp³d²
3. ClF₃ : sp³d
4. SF₄ : sp³

The correct order of sigma bond strength corresponding to the given overlaps is

1. s - s > s - p > p - p
2. s - s > p - p > s - p
3. s - s > s - p = p - p
4. s - s < s - p < p - p

Which of the following has the largest size in aqueous medium?

1. Li⁺
2. Na⁺
3. Cs⁺
4. K⁺

Which of the following has the highest dipolement?

1. HCN
2. HNC
3. CO
4. NH₃

Which of the following has a permanent dipole moment?

1. BCl₃
2. CH₄
3. XeF₄
4. XeF₆

Select from the following that exists dominantly

1. HF₂^-
2. HBr₂^-
3. HCl₂^-
4. HI₂^-

The dipole moment of LiH is 1.9 * 10^-29 Cm and the interionic distance between Li and H in the species is 1.6A Calculate % ionic character of LIH

Select the order that is correct about Bond angle

1. NO₂⁺ > NO₂ > NO₂^-
2. NH₃ > PH₃ > AsH₃
3. BF₃ = BCl₃ = BBr₃
4. All are correct

Which of the following is trigonal planar in shape?

1. N(SiH₃)₃
2. CCl₃^(-)
3. XeF₄
4. 1 and 2

Experimentally determined molecular mass of acetic acid (CH₃COOH) is 120 instead of 60. This is due to the formation of

Correct order of bond order among C₂⁺, C₂, C₂^- and C₂^2- is

1. C₂^2- > C₂ > C₂^- > C₂⁺
2. C₂^2- > C₂^- > C₂ > C₂⁺
3. C₂ > C₂^- > C₂⁺ > C₂^2-
4. C₂^2- > C₂^- > C₂⁺ > C₂

The number of bond and a bonds in a molecule of tetracyano ethylene are

Order of bond angle among NO₂ , NO₂⁺ ,NO₂^- is

1. NO₂  > NO₂⁺ > NO₂^-
2. NO₂⁺ > NO₂^- > NO₂
3. NO₂^-  > NO₂  > NO₂⁺
4. NO₂⁺ > NO₂  > NO₂^-

The formal charge of the oxygen atom in OH- is

Hybridisation in ammonium ion is

1. sp²
2. sp³
3. sp³d
4. sp³d²

Select the following that has correct order of greater extent of overlapping of pure orbitals

1. 2s - 2s > 2s - 2p > 2p - 2p
2. 2p - 2p > 2s - 2p > 2s - 2s
3. 2s - 2s > 2p - 2p > 2s - 2p
4. All have same extent of overlapping since all have same orbit

O-P-X (X= halogen) bond angle is maximum in

1. POF₃
2. POCl₃
3. POBr₃
4. POI₃

Lattice energy of an ionic compound depends on

Which of the following statement is correct?

Which of the following statements is correct?

1. Bond order of CO is greater than CO⁺
2. CO is paramagnetic
3. CO⁺ is diamagnetic
4. The bond order of  CO⁺ is greater than CO

Which one of the following combination is not allowed in LCAO method for the formation of a molecular orbital? (Consider Z-axis as the molecular axis).

1. s + p_z
2. P_x + p_x
3. p_z + p_z
4. s + p_x

Which of the following is correct?

1. O₂^2- is more stable than O₂²⁺
2. _N2^2- is more stable than N₂²⁺
3. O₂⁺is more stable than O₂^-
4. O₂ is more stable than O₂²⁺

The species which does not show paramagnetism is

1. O₂⁺
2. O₂
3. H₂⁺
4. O₂^-2

Total number of lone pair and bond pair of electron of Xe in XeOF₄ are

Which one has the maximum bond dissociation energy?

1. O₂
2. O₂⁺
3. O₂^-
4. O₂^2-

Which has zero dipole moment?

1. CFCl₃
2. SiF₄
3. ClF
4. PCl₃

The ONO bond angle is maximum in

1. NO₂^-
2. NO₃^-
3. NO₂
4. All have the same bond angle

The correct order for bond length in N₂, CN, C = C is

1. C = C > C = N > N = N
2. N = N > C = N > C = C
3. N = N > C=C > C = N
4. C = N > N = N > C = C

Hybridisation of Xe in XeO₂F₂ is

1. sp³
2. sp³d
3. sp³d²
4. sp

I₃^- have the following hybridisation

1. sp³
2. sp³d
3. sp³d²
4. sp²

Which has greater lattice energy?