Explanation

The figure of speech that involves the use of exaggeration for emphasis or effect is hyperbole. 

Explanation

Are we all ready to leave on vacation?

all ready – means “completely ready"

Explanation

Obsessive – Means excessively preoccupied or fixated

Fits perfectly — the coach is over-the-top about fitness

Explanation

 "You must quit smoking or it will damage your lungs."

Must → Strong obligation or necessity. Best fit in this sentence for urgency.

Explanation

Most catalytic elements or their compounds belong to the d-block. 

d-block elements (transition metals):

These elements are known for their ability to participate in a wide variety of chemical reactions due to the availability of their d-orbitals. This allows them to act as catalysts by facilitating the formation of intermediate compounds and lowering the activation energy of reactions. 

Explanation

 The direction of energy flow in an ecosystem is unidirectional, moving through various trophic levels successively.

It begins with the input of solar energy, which is captured by primary producers, such as plants, through photosynthesis.

Explanation

Enthalpy of hydration:

This term refers to the energy change when one mole of gaseous ions dissolves in water to form an infinitely dilute solution, meaning the ions are completely surrounded by water molecules

Explanation

An oxymoron is a figure of speech that juxtaposes concepts with opposite meanings within a word or in a phrase that is a self-contradiction.

As a rhetorical device, an oxymoron illustrates a point to communicate and reveal a paradox.

Explanation

 As a chemical reaction progresses, the concentration of reactants decreases, leading to a decrease in the rate of reaction.

This is because there are fewer reactant particles available to collide and react. 

Explanation

Add some milk and sugar to your tea.

When adding ingredients to a liquid, "to" is the appropriate preposition.