question The reaction 2H Cl 2HCl is an example of a

Chemistry

The reaction 2H₂ + Cl₂ → 2HCl is an example of a:

A. Synthesis
B. Decomposition
C. Redox
D. Combustion

The given equation represents a synthesis reaction forming hydrogen chloride.

The compound KNO₃ is commonly known as:

A. Potassium nitrate
B. Potassium chloride
C. Potassium sulfate
D. Potassium carbonate

What is the standard enthalpy of formation (ΔH°f) for an element in its most stable form?

A. 0 kJ/mol
B. 1 kJ/mol
C. -1 kJ/mol
D. Depends on the element

The reaction of an alcohol with a carboxylic acid in the presence of an acid catalyst is known as:

A. Esterification
B. Transesterification
C. Saponification
D. Hydrolysis

The standard entropy of a substance is defined at:

A. 1 atm pressure and 0 K
B. 1 atm pressure and 25°C
C. 0 atm pressure and 0 K
D. 0 atm pressure and 100°C

What is the term for a bond formed by the attraction between oppositely charged ions in a crystal lattice?

A. Ionic
B. Covalent
C. Metallic
D. Polar

What is the heat capacity at constant pressure (Cp) for an ideal monatomic gas?

A. (5/2)R
B. (7/2)R
C. (3/2)R
D. (9/2)R

The concept that energy levels of electrons in an atom are quantized is explained by:

A. Bohr's model
B. Schrödinger equation
C. Pauli exclusion principle
D. Hund's rule

The reaction between an alkene and a peracid to form an epoxide is known as:

A. Epoxidation
B. Hydrogenation
C. Hydration
D. Halogenation

The Krebs cycle (citric acid cycle) occurs in which cellular organelle?

A. Mitochondria
B. Nucleus
C. Endoplasmic reticulum
D. Golgi apparatus

The bond angle in a molecule with a linear shape is:

A. 180°
B. 120°
C. 90°
D. 109.5°