Dry Ice

Q.

Which of the following is/are uses of dry ice?

1. Refrigeration and preservation of foodstuffs.

2. Used as bait to trap insects, mosquitoes etc.

3. Used in carbonated drinks

4. Used in the manufacture of urea

Q.

Which of the following is used to make artificial clouds?

Q.

Give one word or a phrase for the following.

Solid carbon dioxide.

Q.

Which of the following is/are uses of dry ice?

1. The refrigerant in Cool drinks

2. Lab bath

3. Curing local burns

4. None of these

Q. What happens when an astronaut heats ice at $-5^{o}C$ on the moon?

1. Its temperature rises and then melt at $0^{o}C$.
2. It melts into water $-5^{o}C$.
3. It melts at temperature greater than $0^{o}C$.
4. It sublimates into vapours.

Q. y food packets are heat sealed?