A solution contains 25% water, 25% ethanol \((C_2H_5OH)\) and 50% acetic acid \((CH_3COOH)\) by mass. The mole fraction of:
(a) Water \(=0.502\)
(b) Ethanol \(=0.302\)
(c) Acetic acid \(=0.196\)
(d) Ethanol + Acid \(=0.497\)
Choose the correct option:
1. (a), (b)
2. (c), (d)
3. (a), (d)
4. None of the above
Subtopic:  Concentration Based Problem |
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The mole fraction of the solute in a 1.00 molal aqueous solution is: 

1. 0.00177 2. 0.0344
3. 0.0177 4. 0.1770
Subtopic:  Concentration Based Problem |
Level 3: 35%-60%
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital

What is the concentration of nitrate ions in 40.0 mL of a 0.25 M solution of copper(II) nitrate?

1. 0.010 M
2. 0.020 M
3. 0.050 M
4. 0.50 M
Subtopic:  Concentration Based Problem |
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