Explanation

The IUPAC name of acetone is propanone or propan-2-one.

It is also known as 2-propanone. 

Explanation

Explanation

When ethanol is in excess and the temperature is around 140°C, concentrated H₂SO₄ acts as a dehydrating agent and promotes the formation of diethyl ether:

2CH₃CH₂OH → CH₃CH₂–O–CH₂CH₃ + H₂O

So, the major product is ether (specifically diethyl ether) under these conditions.

Explanation

Whey, the liquid part of milk after curdling, contains lactose, proteins, and nutrients that can be used by both:

- Bacteria – for fermentation (e.g., in yogurt or cheese production)

- Yeast – as a nutrient source in certain fermentation processes

Explanation

Astatine is considered the rarest naturally occurring element on Earth, making it the "rare halogen" among the group which includes fluorine, chlorine, bromine, and iodine. 

Explanation

B cells are white blood cells that are specifically responsible for producing antibodies when the body detects a foreign pathogen like a bacteria or a virus. 

Explanation

Sticky ends are formed when a restriction enzyme cuts DNA at specific locations, leaving short, single-stranded overhangs with unpaired bases at the ends.

These unpaired bases can then form hydrogen bonds with complementary unpaired bases on another DNA fragment, allowing them to "stick" together, hence the name "sticky ends". 

Explanation

A gas being cooled is a system where entropy is decreasing. 

When a gas is cooled, its molecules slow down and become more ordered, leading to a decrease in entropy. 

Explanation

 Cleavage is the tendency of a crystal to break along specific planes of weakness.

Copper, being a metal, has a unique atomic structure that doesn't exhibit distinct planes of weakness.

When stressed, it tends to deform rather than cleave, resulting in a jagged fracture. 

Explanation

 When an object moves at constant speed, its acceleration is zero.  

According to Newton’s Second Law:  

F = ma → If a = 0, then F = 0