Q. No.1. 4 u of helium
2. 4 g of helium
3. 2.27 L of helium at STP
4. 4 mol of helium
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | 14 g of \(N_2\) | 2. | 18 g of \(H_2O\) |
| 3. | 16 g of CO | 4. | 28 g of \(N_2\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch List-I with List-II:
| List-I | List-II | ||
| (a) | 4.48 litres of O2 at STP | (i) | 0.2 moles |
| (b) | 12.022 × 1022 molecules of H2O | (ii) | 12.044 × 1023 molecules |
| (c) | 96 g of O2 | (iii) | 6.4 g |
| (d) | 88 g of CO2 | (iv) | 67.2 litres at STP |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (iv) | (ii) |
| 2. | (iii) | (i) | (iv) | (ii) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (iii) | (i) | (ii) | (iv) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(Consider Fe0.96 to be made up of Fe(II) and Fe(III) only)
1. \(\frac{1}{12}\)
2. \(0.08\)
3. \(\frac{1}{16}\)
4. \(\frac{1}{20}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe maximum number of atoms is present in which of the following -
1. 1 g of Mg(s)
2. 1 g of O2 (g)
3. 1 g of Li(s)
4. 1 g of Ag(s)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOne mole of carbon atom weights 12 g, the number of atoms in it is equal to:
(Mass of carbon – 12 is )
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf Avogadro number \(N_{A}\), is changed from \(6 . 022 \times \left(10\right)^{23}\)\(\text{mol}^{- 1}\) to \(6 . 022 \times \left(10\right)^{20} ~\text{mol}^{- 1}\) this would change:
| 1. | The definition of mass in units of grams |
| 2. | The mass of one mole of carbon |
| 3. | The ratio of chemical species to each other in a balanced equation |
| 4. | The ratio of elements to each other in a compound |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of water molecules is maximum in?
| 1. | 18 molecules of water | 2. | 1.8 g of water |
| 3. | 18 g of water | 4. | 18 moles of water |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA mixture of gases contains H2 and O2 gases in the ratio of 1 : 4 (w/w). The molar ratio of the two gases in the mixture will be:
| 1. | 1:4 | 2. | 4:1 |
| 3. | 16:1 | 4. | 2:1 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
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