Give the geometry of (CH₃)₃N and [(CH₃)₃Si]₃N state if they are isostructural?

One day when Ravi was passing by his laboratory and felt some suffocating odour. He saw his laboratory attendant was preparing some chemical, named as ammonia. Suddenly, he saw that some chemical had fallen at the hand of the attendant. He run at once and take some highly diluted HCl and apply at the burned place.By this the attendent got relief.
Can you predict and draw the structures of these compound.Also mark the central atom and find out the bond pairs and lone pairs.

Rahul, a brilliant science student, was very keen to do experiments and get knowledge from them. One day he took some sugar and salt separately and added some acid of sulfur (which is generally used for toilet cleaning) and notice the changes. He got confused as he expected that the reaction of salt should be faster. Next day he asked about his experiment to his science teacher, who clarity the reason for the result he got. He got satisfied.
Draw the electron dot structure of acid of sulphur and salt.

Write the resonance structures for SO₃, NO₂ and NO^-₃

Explain with the help of suitable example polar covalent bond.

Discuss the orbital structures of the following molecules on the basis of hybridization
(i) BH₃
(ii) C₂H₂

Describe the hybridisation in case of PCl₅, Why are the axial bonds longer as compared to equatorial bonds?