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Q. No.A mixture containing 2.3 g of formic acid (HCOOH) and 4.5 g of oxalic acid (Hâ‚‚Câ‚‚Oâ‚„) is
heated with concentrated Hâ‚‚SOâ‚„. The gases evolved are passed through KOH pellets.
Calculate the mass of the gas that remains unabsorbed by KOH.
1. 1.4
2. 3.0
3. 2.8
4. 4.4
Subtopic: Â Equation Based Problem |
 58%
Level 3: 35%-60%
NEET - 2018
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Which of the following samples contains the maximum number of water molecules?
1. 18 mL of water
2. 0.18 g of water
3. 0.00224 L water vapours at 1 atm and 273 K
4. 10-3 mol of water
1. 18 mL of water
2. 0.18 g of water
3. 0.00224 L water vapours at 1 atm and 273 K
4. 10-3 mol of water
Subtopic: Â Moles, Atoms & Electrons |
 59%
Level 3: 35%-60%
NEET - 2018
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Which of the following is dependent on temperature?
| 1. | Molarity | 2. | Mole fraction |
| 3. | Weight percentage | 4. | Molality |
Subtopic: Â Concentration Based Problem |
 83%
Level 1: 80%+
NEET - 2017
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Two elements, X and Y, form the compounds XY₂ and X₃Y₂. If 0.1 mol of XY₂ has a mass of 10 g and 0.05 mole of X₃Y₂ has a mass of 9 g, what are the atomic masses of X and Y, respectively?
| 1. | 40, 30 | 2. | 60, 40 |
| 3. | 20, 30 | 4. | 30, 20 |
Subtopic: Â Equation Based Problem |
 78%
Level 2: 60%+
NEET - 2016
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Q. No.
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