question The compound NH Cl is commonly known as

Chemistry

The compound NH₄Cl is commonly known as:

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

NH₄Cl is commonly known as ammonium chloride.

Which term refers to the precision and reproducibility of results obtained from the same sample under identical conditions?

A. Repeatability
B. Robustness
C. Linearity
D. Sensitivity

What is the IUPAC name for CH₃CH₂COOH?

A. Acetic acid
B. Propionic acid
C. Butanoic acid
D. Ethanoic acid

What is the IUPAC name for CH₃COCH₃?

A. Acetone
B. Propanone
C. Butanone
D. Ethanal

Which analytical technique is suitable for identifying and quantifying volatile organic compounds in environmental samples?

A. Headspace gas chromatography
B. Fourier-transform infrared spectroscopy
C. Liquid chromatography-mass spectrometry
D. Nuclear magnetic resonance

Which of the following is an example of a secondary alcohol?

A. CH₃OH
B. CH₃CH₂OH
C. (CH₃)₂CHOH
D. CH₃COOH

Which of the following is an example of a tertiary alcohol?

A. CH₃OH
B. CH₃CH₂OH
C. (CH₃)₃COH
D. CH₃COOH

Which of the following is a noble gas?

A. Neon
B. Sodium
C. Chlorine
D. Sulfur

The van't Hoff equation relates the change in equilibrium constant with:

A. Temperature
B. Pressure
C. Volume
D. Concentration

Which of the following is an example of a strong acid used in laboratories?

A. Hydrochloric acid (HCl)
B. Acetic acid (CH₃COOH)
C. Citric acid
D. Carbonic acid (H₂CO₃)

What is the general formula for alkenes?

A. CnH₂n+2
B. CnH2n
C. CnH2n-2
D. CnHn