"You Can Do This"

JEE MAINS 2020 | You Can Do It | Motivational Video For JEE Aspirants

You can decrease the kinetic energy of an object as much as you want. You can do so by either reducing mass by half or reducing the speed by half. Which option would you pick, and why ?

If you have to make a choice of 7 questions out of 10 questions set, you can do it in

How quickly can you do this? Fill appropriate sign.( )

You can buy solid air-freshnersin shops. Do you think these substanecs are ionic or covalent? Why?