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Q. No.The number of significant figures in the following numbers is:
| (I). | 161 cm |
| (II). | 0.0161 |
| (III). | 1.61 |
1. 3, 3, 3
2. 3, 4, 3
3. 3, 2, 3
4. 3, 4, 4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf the density of the solution is 3.12 g ml-1, then what will be the mass of the 1.5 ml solution in two significant figures?
| 1. | \(4.4~\mathrm{g}\) | 2. | \(4680 \times 10^{3} ~\mathrm{g}\) |
| 3. | \(4.7~\mathrm{g}\) | 4. | \(46.80~\mathrm{g}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| List I | List II | ||
| a. | Micro | i. | m |
| b. | Mega | ii. | m |
| c. | Giga | iii. | m |
| d. | Femto | iv. | m |
| a | b | c | d | |
| 1. | i | iv | iii | ii |
| 2. | iii | iv | ii | i |
| 3. | ii | iii | iv | i |
| 4. | i | iii | iv | ii |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following physical quantities with units.
| Physical quantity | Unit | ||
| A. | Molarity | 1. | mol kg–1 |
| B. | Molality | 2. | mol L–1 |
| C. | Pressure | 3. | Candela |
| D. | Luminous intensity | 4. | Pascal |
Codes:
| A | B | C | D | |
| 1. | 1 | 4 | 2 | 3 |
| 2. | 2 | 1 | 4 | 3 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Statement I: | Scientific notation for 0.00016 is \(1.6 \times 10^{-3} \). |
| Statement II: | The volume of water to be added to change the molarity of 200 mL 0.5 M aqueous solution to 0.1 M is 800 mL. |
| 1. | Statement I is correct, Statement II is correct. |
| 2. | Statement I is incorrect, Statement II is correct. |
| 3. | Statement I is correct, Statement II is incorrect. |
| 4. | Statement I is incorrect, Statement II is incorrect. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. Law of conservation of mass
2. Law of multiple proportions
3. Law of constant proportions
4. Gay Lussac's law of constant volume
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. 1.56 × 1021
2. 6.23 × 1021
3. 1.57 × 1022
4. 2.49 × 1022
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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 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 & BiologyAll gases are at 0 °C and 1 atm pressure when 1 mole of gas has a volume of 22.4 L.
[Relative atomic mass, Ar : H = 1, He = 4, C = 12, O = 16, Cl = 35.5]
1. 33.6 L of chlorine gas
2. 66.0 g of carbon dioxide gas
3. 22.4 L of hydrogen gas
4. 10.0 g of helium gas
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