Question

Match the following:

List-I (Metal in drinking water)	List-II (Maximum prescribed concentration in ppm)
A) Mn	I) \( 0.05 \)
B) Zn	II) \( 3.0 \)
C) Cd	III) \( 0.005 \)
D) Cu	IV) \( 5.0 \)

• A. A-IV, B-II, C-I, D-III
• B. A-I, B-III, C-IV, D-II
• C. A-III, B-II, C-IV, D-I
• D. A-I, B-IV, C-III, D-II

Hint:

Heavy metals have very low tolerance limits in water due to toxicity (e.g., Cd = 0.005 ppm), while essential metals like Zn have higher permissible limits.

Answer 1

The Correct Option is D

Step 1: Recall the safe ppm limits for each metal in drinking water. 

Manganese (Mn): Maximum permissible limit is 0.05 ppm
Zinc (Zn): Maximum permissible limit is 5.0 ppm
Cadmium (Cd): Maximum permissible limit is 0.005 ppm
Copper (Cu): Maximum permissible limit is 3.0 ppm

Step 2: Matching List-I with List-II
 

A) Mn → \( I \) (0.05)
B) Zn → \( IV \) (5.0)
C) Cd → \( III \) (0.005)
D) Cu → \( II \) (3.0)