question Which of the following is a strong base

Chemistry

Which of the following is a strong base?

A. NaOH (Sodium hydroxide)
B. NH₄OH (Ammonium hydroxide)
C. KOH (Potassium hydroxide)
D. CH₃COOH (Acetic acid)

Sodium hydroxide (NaOH) is a strong base.

What is the IUPAC name for CH₃CH₂CH₂CONH₂?

A. Propylamide
B. Butanamide
C. Pentanamide
D. Ethylamide

In thermodynamics, "work" is considered positive when:

A. The system does work on the surroundings
B. The surroundings do work on the system
C. No work is done
D. The work is reversible

Which law of thermodynamics is also known as the law of conservation of energy?

A. First Law
B. Second Law
C. Third Law
D. Zeroth Law

The Schrödinger equation is used to calculate the:

A. Wave function of an electron
B. Mass of an electron
C. Charge of an electron
D. Spin of an electron

The group of elements known as halogens includes:

A. Fluorine, Chlorine, Bromine
B. Sodium, Potassium, Lithium
C. Carbon, Nitrogen, Oxygen
D. Iron, Nickel, Cobalt

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium carbonate (Na₂CO₃) is:

A. 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂
B. HCl + Na₂CO₃ → NaCl + H₂O + CO₂
C. 2HCl + Na₂CO₃ → NaCl + H₂O + CO₂
D. HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂

The reaction 2H₂ + O₂ → 2H₂O represents a:

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

The bond angle in a molecule with a trigonal pyramidal shape is approximately:

A. 107°
B. 120°
C. 180°
D. 90°

The reaction of an alkene with a peroxide to form an alkyl radical is known as:

A. Halogenation
B. Hydrogenation
C. Hydration
D. Anti-Markovnikov addition

The spin quantum number of an electron can have values of:

A. +1/2 or -1/2
B. 0 or 1
C. +1 or -1
D. 1/2 or 1