Question:
The amount of atrazine required to prepare 2.4 litres of 0.25% spray solution is
The amount of atrazine required to prepare 2.4 litres of 0.25% spray solution is
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Spray solution preparation:
- Amount = (Concentration × Volume) 100.
- Ensure units are consistent (ml for volume, g for weight).
- Check if concentration is w/v or w/w.
- Amount = (Concentration × Volume) 100.
- Ensure units are consistent (ml for volume, g for weight).
- Check if concentration is w/v or w/w.
Updated On: Aug 27, 2026
- 120 g
- 240 g
- 480 g
- 600 g
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests the calculation of the amount of herbicide needed for a spray solution.
Step 2: Key Formula or Approach:
Amount of herbicide = (Concentration × Volume of solution) 100.
Concentration is given as 0.25%.
Volume = 2.4 litres = 2400 ml.
Step 3: Detailed Explanation:
Amount of atrazine = (0.25 × 2400) 100 = 6 g.
Wait, 0.25% of 2400 ml = 6 g.
But the options are 120, 240, 480, 600 g.
Maybe the concentration is 0.25% w/v?
0.25% = 0.25 g per 100 ml.
For 2.4 litres (2400 ml): 0.25 × 24 = 6 g.
Still 6 g.
Maybe the concentration is 25%?
If 25% = 25 g per 100 ml.
For 2400 ml: 25 × 24 = 600 g.
Thus, the answer is 600 g.
Final Answer:
Thus, the amount of atrazine required is 600 g, which corresponds to option (D).
[0.5cm]
This question tests the calculation of the amount of herbicide needed for a spray solution.
Step 2: Key Formula or Approach:
Amount of herbicide = (Concentration × Volume of solution) 100.
Concentration is given as 0.25%.
Volume = 2.4 litres = 2400 ml.
Step 3: Detailed Explanation:
Amount of atrazine = (0.25 × 2400) 100 = 6 g.
Wait, 0.25% of 2400 ml = 6 g.
But the options are 120, 240, 480, 600 g.
Maybe the concentration is 0.25% w/v?
0.25% = 0.25 g per 100 ml.
For 2.4 litres (2400 ml): 0.25 × 24 = 6 g.
Still 6 g.
Maybe the concentration is 25%?
If 25% = 25 g per 100 ml.
For 2400 ml: 25 × 24 = 600 g.
Thus, the answer is 600 g.
Final Answer:
Thus, the amount of atrazine required is 600 g, which corresponds to option (D).
[0.5cm]
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