Concentrated nitric acid is 70% HNO3. The amount of concentrated nitric acid solution that should be used to prepare 250 mL of 2.0 M HNO3 would be:
1. 45.0 g conc. HNO3
2. 90.0 g conc. HNO3
3. 70.0 g conc. HNO3
4. 54.0 g conc. HNO3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology6.02x1020 molecules of urea are present in 100mL of its solution. The concentration of the solution is:
1. 0.02M
2. 0.01M
3. 0.001M
4. 0.1M
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of The following has a maximum number of molecules?
1. 7g N2
2. 2g H2
3. 16g NO2
4. 16g O2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of moles of KMnO4 reduced by one mole of KI in an alkaline medium is-
1. One fifth
2. Five
3. One
4. Two
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of moles of oxygen in 1L of air containing 21% oxygen by volume, under standard conditions, is
1. 0.0093 mole
2. 2.10 moles
3. 0.186 mole
4. 0.21 mole
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat volume of oxygen gas (O2) measured at and 1 atm, is needed to burn completely 1L of propane gas (C3H8) measured under the same conditions?
1. 7L
2. 6L
3. 5L
4. 10L
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1 g of magnesium is burnt with 0.56g of oxygen in a closed vessel. The left-out reactant and its quantity are
(At. weight of Mg = 24, O=16)
1. Mg, 0.16g
2. O2, 0.16g
3. Mg, 0.44g
4. O2, 0.28g
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPercentage of Se in peroxidase anhydrase enzyme is 0.5% by weight (at. weight = 78.4), then minimum molecular weight of peroxidase anhydrase enzyme is
1. 1.568 x 103
2. 15.68
3. 2.168 x 104
4. 1.568 x 104
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyNumber of moles of Mn required to oxidise one mole of ferrous oxalate completely in acidic medium will be
1. 0.6 mole
2. 0.4 mole
3. 7.5 moles
4. 0.2 mole
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology