question The chemical equation 2Fe 3Cl 2FeCl represents a

Chemistry

The chemical equation 2Fe + 3Cl₂ → 2FeCl₃ represents a:

A. Single displacement
B. Double displacement
C. Synthesis
D. Decomposition

The given equation represents a single displacement reaction.

What is the primary function of a reagent in analytical chemistry?

A. Reacting with the analyte to produce a product
B. Providing color to the solution
C. Acting as a solvent
D. Maintaining a constant temperature

The bond angle in a water (H2O) molecule is approximately:

A. 104.5°
B. 120°
C. 180°
D. 90°

Which analytical technique involves passing an electric current through a solution to determine the concentration of an analyte?

A. Electrochemical methods
B. Spectroscopy
C. Chromatography
D. Titration

In the periodic table, the lanthanides belong to the:

A. f-block
B. p-block
C. d-block
D. s-block

The relationship between heat transfer (Q), mass (m), specific heat (C), and temperature change (ΔT) is given by:

A. Q = mcΔT
B. Q = mΔT/C
C. Q = C/mΔT
D. Q = ΔT/mC

The alpha particle consists of:

A. 2 protons and 2 neutrons
B. 2 electrons and 2 protons
C. 3 protons and 2 neutrons
D. 4 protons and 4 neutrons

Which of the following is a halide ion?

A. Cl⁻
B. Ca²⁺
C. K⁺
D. SO₄²⁻

Which acid is found in citrus fruits like lemons and oranges?

A. Citric acid
B. Acetic acid
C. Sulfuric acid
D. Hydrochloric acid

Which technique involves the study of the interaction between magnetic nuclei and an external magnetic field?

A. Nuclear magnetic resonance (NMR)
B. Gas chromatography (GC)
C. Mass spectrometry (MS)
D. X-ray diffraction

The compound CH₄ is commonly known as:

A. Methane
B. Ethane
C. Propane
D. Butane