Explanation

N2 (Nitrogen) has the highest critical temperature among the options (Helium - He and Hydrogen - H). 

Nitrogen (N2): While still lower than many other substances

It has a higher critical temperature than Helium because of stronger intermolecular forces. 

Explanation

A molecule is formed when two or more atoms chemically bond together.

While "H" represents the element hydrogen, it is a single atom and not a molecule.

A molecule of hydrogen is represented as H2, where two hydrogen atoms are bonded together. 

Explanation

Atto (a) = 10⁻¹⁸

Femto (f) = 10⁻¹⁵

Nano (n) = 10⁻⁹

Peta (P) = 10¹⁵

So, Atto has the smallest (lowest) value.

Explanation

Explanation

Ribose and Deoxyribose

Are isomers

• Both are monosaccharides (simple sugars) with the same molecular formula: C₅H₁₀O₅.

• Deoxyribose differs from ribose by one less oxygen atom at the 2' carbon (hence "deoxy").

• They are structural isomers (same formula, different structure).

Explanation

At 98% saturation, hemoglobin carries about 19.6 ml O₂ per 100 ml of blood.

Explanation

Calculate the second frequency. Divide the first frequency by the number of parts.

1/4=0.25     

Explanation

The Rydberg constant (R) is a physical constant used in atomic spectroscopy.

Its approximate value is 1.097×10^5 m-1  

Explanation

 The digestive system in animals develops primarily from the endoderm, with contributions from the mesoderm for certain structures.

The ectoderm plays a role in the development of the mouth and anus.

Explanation

Blubber is a thick layer of fatty tissue found under the skin of whales, seals, and other marine mammals.

It acts as insulation against cold temperatures in ocean water and also serves as an energy reserve.