Question detail
Which statement would earn credit for Compare instrumental methods with chemical tests in terms of speed, sensitivity and…?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Identification of ions by chemical and spectroscopic means
Question
- A. Instrumental methods are less accurate than chemical tests.
- B. Instrumental methods can analyze larger sample sizes.
- C. Instrumental methods are faster and more sensitive.
- D. Instrumental methods are easier to perform than chemical tests.
Answer
The correct answer is Instrumental methods are faster and more sensitive.. It matches chemical analysis because the evidence is test observation and the expected result is supported conclusion.
Explanation
The correct option is Instrumental methods are faster and more sensitive.. The answer stays inside Identification of ions by chemical and spectroscopic means by linking the observation to the conclusion instead of naming a substance without evidence. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Confusing Speed and Sensitivity
Students often confuse the speed of instrumental methods with their sensitivity, thinking that faster methods are always more sensitive.
Correct this by using the approved Instrumental methods context: Compare instrumental methods with chemical tests in terms of speed, sensitivity and sample size. Name the correct test or chemistry idea, state the observation accurately, and then give the conclusion supported by that evidence. Do not swap gas tests, flame tests, cation tests, anion tests, chromatography terms, pure substances, and formulations.
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