Explanation

Methylamine and hydrogen peroxide are liquids due to Hydrogen bonding. 

Hydrogen bonding is a strong type of intermolecular force

That occurs when a hydrogen atom is bonded to a highly electronegative atom 

Like oxygen, nitrogen, or fluorine. In methylamine (CH3NH2)

The nitrogen atom has a lone pair of electrons and can form hydrogen bonds with other methylamine molecules.

Similarly, hydrogen peroxide (H2O2) has hydrogen atoms bonded to oxygen atoms, allowing for hydrogen bonding.

These strong hydrogen bonds hold the molecules together in the liquid state. 

Explanation

Explanation

Macromolecules are large, complex molecules composed of smaller repeating units called monomers.

Thyroxin, haemoglobin, and insulin are all proteins, which are macromolecules made up of chains of amino acids.

Maltose, on the other hand, is a disaccharide, meaning it's made up of only two sugar units (glucose) and is not considered a true macromolecule. 

Explanation

 Molecular mass of water (H₂O) = 2(1) + 16 = 18 g/mol

- This means 18 grams of water contains 1 mole of water molecules.  

Explanation

 "Tooth and nail" is an idiom that means to fight very fiercely or with great determination.

Explanation

An alkyl group is formed by removing a hydrogen atom from an alkane, and since the hydrogen atom is removed with one bonding electron, the resulting group has an unpaired electron, making it a radical. 

Explanation

In an atom, no two electrons can have the same set of four quantum numbers.

This is known as the Pauli Exclusion Principle.

The four quantum numbers are: 

Explanation

The total energy of a hydrogen atom in its ground state is negative. 

The energy of a hydrogen atom in its ground state is typically represented as -13.6 eV.

A negative energy value indicates that the electron is bound to the nucleus and requires energy to be overcome to escape.

The ground state is the lowest energy level an electron can occupy in a hydrogen atom. 

Explanation

Fluorine, being the smallest halogen, has the weakest intermolecular forces and therefore the lowest boiling point. 

Explanation

 Glycolysis is the initial stage of both fermentation and cellular respiration, breaking down glucose into pyruvate and generating a small amount of ATP and NADH, regardless of whether oxygen is present.