Q. No.| Assertion (A): | 1 g O2 and 1 g O3 have an equal number of oxygen atoms. |
| Reason (R): | O2 and O3 have different molar masses. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Match the following physical quantities with units.
| Physical quantity | Unit | ||
| A. | Molarity | (i). | mol kg–1 |
| B. | Molality | (ii). | mol L–1 |
| C. | Pressure | (iii). | Candella |
| D. | Luminous intensity | (iv). | Pascal |
Codes:
| A | B | C | D | |
| 1. | (i) | (iv) | (ii) | (iii) |
| 2. | (ii) | (i) | (iv) | (iii) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (iv) | (i) | (iii) | (ii) |
| 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 |
At 100 ºC and 1 atm, if the density of liquid water is 1.0 g cm–3 and that of water vapor is 0.0006 g cm-3, then the volume occupied by water molecules in 1 litre of steam at that temperature will be:
| 1. | 6 cm3 | 2. | 60 cm3 |
| 3. | 0.6 cm3 | 4. | 0.06 cm3 |
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
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
ln the final answer of the expression \(\large{\frac{(29.2-20.2)\times(1.79\times10^5)}{1.37}}\)
the number of significant figures after solving the expression is:
| 1. | 2 | 2. | 4 |
| 3. | 6 | 4. | 7 |
1. 2, 4, and 3
2. 4, 1, and 3
3. 4, 4, and 6
4. 4, 4, and 3
If 0.5 moles of BaCl2 is reacted with 0.2 moles of Na3PO4 then the maximum moles of Ba3(PO4)2 formed is:
| 1. | 0.33 | 2. | 0.25 |
| 3. | 0.10 | 4. | 0.52 |
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