Rita added dilute hydrochloric acid to four metals. She recorded her observations in the table given below. While noting her observations she made some errors.
Rita added dilute hydrochloric acid to four metals. She recorded her observations in the table given below. While noting her observations she made some errors.
Show Hint
- 1 only
- 3 only
- Both 1 and 4
- Both 2 and 4
The Correct Option is D
Solution and Explanation
Step 1: Understanding Metal-Acid Reactivity:
Metals that are more reactive than hydrogen (positioned above hydrogen in the reactivity series) displace hydrogen from dilute acids to produce hydrogen gas.
Step 2: Evaluating the Observations:
beginenumerate Copper (Cu): Below hydrogen in the reactivity series. It does not react with dilute HCl. (Observation 1 is Incorrect). Iron (Fe): Above hydrogen. It reacts to give (H_2) gas. (Observation 2 is Correct). Magnesium (Mg): Highly reactive, above hydrogen. It reacts vigorously to give (H_2) gas. (Observation 3 is Incorrect). Zinc (Zn): Above hydrogen. It reacts to give (H_2) gas. (Observation 4 is Correct). endenumerate
Step 3: Identifying Correct Observations:
Only observations 2 (Iron) and 4 (Zinc) accurately reflect the chemical reality.
Step 4: Final Answer:
The correct choice is Both 2 and 4.
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