Hi prakhar88,
To confirm, your performance on the Quant section has no impact on the questions that you receive during the Verbal section.
You noted a significant drop in your Official Verbal Scaled Score (relative to what you were scoring on your practice CATs). When these types of score drops occur, the two likely "causes" involve either something that was unrealistic during practice or something that was surprising (or not accounted for) on Test Day.
If you can answer a few questions, then we should be able to figure this out:
When you took your CATs:
1) Did you take the ENTIRE CAT (including the Essay and IR sections)?
2) Did you take them at home?
3) Did you take them at the same time of day as your Official GMAT?
4) Did you ever do ANYTHING during your CATs that you couldn't do on Test Day (pause the CAT, skip sections, take longer breaks, etc.)?
5) Did you ever take a CAT more than once?
Thankfully, the GMAT is a predictable, standardized Test, so you CAN train to score at a higher level.
What is your goal score?
When is your next Test Date?
GMAT assassins aren't born, they're made,
Rich