question The critical point of a substance is the point at which

Chemistry

The critical point of a substance is the point at which:

A. All three phases coexist
B. The vapor pressure becomes zero
C. The substance becomes a supercritical fluid
D. The substance becomes a solid

The critical point of a substance is the point at which it becomes a supercritical fluid.

Which law states that the total pressure of a gas mixture is the sum of the partial pressures of its individual gases?

A. Dalton's law of partial pressures
B. Boyle's law
C. Charles's law
D. Avogadro's law

The Carnot cycle is an idealized cycle for a:

A. Heat engine
B. Refrigerator
C. Heat pump
D. All of the above

What is the primary function of DNA helicase during DNA replication?

A. Unwinding the DNA double helix
B. Synthesizing a new DNA strand
C. Repairing damaged DNA
D. Reading the RNA code

What is the shape of a molecule with a trigonal pyramidal electron domain geometry?

A. Trigonal pyramidal
B. Linear
C. Tetrahedral
D. Bent

The concept of "adiabatic wall" in thermodynamics refers to a boundary that allows:

A. Heat transfer
B. Volume change
C. Pressure change
D. No heat transfer

Which of the following elements is a noble gas used in lighting?

A. Neon
B. Nitrogen
C. Nickel
D. Natrium

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹?

A. Iron
B. Cobalt
C. Nickel
D. Copper

What is the term for the arrangement of electrons in an atom's energy levels and sublevels?

A. Electron configuration
B. Atomic structure
C. Electron arrangement
D. Energy distribution

Which type of bond is formed between amino acids in a polypeptide chain during protein synthesis?

A. Peptide bond
B. Glycosidic bond
C. Ester bond
D. Hydrogen bond

What is the term for the process by which cells break down molecules to release energy in the absence of oxygen?

A. Anaerobic respiration
B. Fermentation
C. Glycolysis
D. Oxidative phosphorylation