Q. No.Match 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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The prefix peta used in the SI system is:
| 1. | \(10^{15}\) | 2. | \(10^{-15} \) |
| 3. | \(10^{18}\) | 4. | \(10^{-18} \) |
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The correct match is:
Codes:
| 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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The number of moles of water present in a spherical water droplet of radius 1.0 cm are:
[Given: Density of water in the droplet = 1.0 g cm–3]
1. \( \dfrac{\pi}{18} \)
2. \( \dfrac{2\pi}{27} \)
3. \(24\pi\)
4. \( \dfrac{2\pi}{9} \)
[Given: Density of water in the droplet = 1.0 g cm–3]
1. \( \dfrac{\pi}{18} \)
2. \( \dfrac{2\pi}{27} \)
3. \(24\pi\)
4. \( \dfrac{2\pi}{9} \)
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A reading on Fahrenheit scale is . The same reading on celsius scale will be :
1. 40°C
2. 94°C
3. 93°C
4. 30°C
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Consider the two statements:
| 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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The numbers 234,000 and 6.0012 can be represented in scientific notation as:
1.
2. 0.234 and
3.
4. 2.34 and 6.0012
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The number of significant figures in the numbers 5005, 500.0, and 126,000 are, respectively:
| 1. | 2, 4, and 3 | 2. | 4, 1, and 3 |
| 3. | 4, 4, and 6 | 4. | 4, 4, and 3 |
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