How many of the given compounds are chiral or optically active

This type of question, asked 4 times: 29 Jun 2022, 1 Feb 2023, 27 Jan 2024, 8 Apr 2024. All 4 questions below, oldest first.

Try each one first, then open its answer.

Question 1
29 Jun 2022
59 $Observe structures of the following compounds The total number of structures/compounds which possess asymmetric carbon atoms is$
Question 2
1 Feb 2023
60 $The total number of chiral compound/s from the following is$
Question 3
27 Jan 2024
150 $Total number of compounds with Chiral carbon atoms from following is _____ .$
Question 4
8 Apr 2024
143 $Total number of optically active compounds from the following is ____$