Question

25. How many electrons are in the Lewis structure of a nitrite ion (NO2-)? A) 18 B) 17 C)16 D) 23 E) 24

Answer 1

Que. 4.

Ans is C. CH3OH

Hydrogen bonding takes place between an electronegative atom (small size) and hydrogen atom of the molecule. In given options only CH3OH conatins electronegative Oxygen atom while other molecule have no electronegative atom. Hence hydrogen bonding exist in this molecule only. CO2 has electronegative Oxygen atom but no hydrogen atom.

Answer 2

25. Lewis structure of the NO, ion is given below as follows: :07 0 Total number of electrons are present in the Lewis structure = 18 Correct answer is A) 38. The structure of the given molecule is as follows: HH 0 : SN-770—H Ha In the above molecule, the hybridization of the carbonyl carbon is spa, therefore, the bond angle is 120° Correct answers is D). 3. London forces are exists in the non-polar molecules and in the monoatomic gases. Ar is a monoatomic gas, therefore, correct answer is Ar. Correct answer is B) 4. Hydrogen bonding are present in that molecules which has hydrogen in bonded with any one atom from the F, O, and N. Therefore, correct answer is C). H3C- O- H Hydrogen Bond 0- H 8- 8+ H3C- 41. TeCl4 molecule has four sigma bonds and one lone pair and it has sew - saw shape. It is shown below as follows; Sew - saw shape

Therefore, correct answer is C). 42. XeF4 molecule has four sigma bond and two lone pairs and it has square planar shape. It is shown below as follows; 12. Lees molecule s fow sig Square planar Therefore, correct answer is E).