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Q. No.Match the prefixes present in column I with their multiples in column II and mark the appropriate choice:
1. (A) →(i), (B)→(ii), (C) →(iii), (D)→ (iv)
2. (A) →(ii), (B)→(i), (C) →(iv), (D)→ (iii)
3. (A) →(iv), (B)→(iii), (C) →(i), (D)→ (ii)
4. (A) →(iii), (B)→(iv), (C) →(ii), (D)→ (i)
| Column I (Prefixes) |
Column II (Multiples) |
||
| (A) | pico | (i) | \(10^9\) |
| (B) | femto | (ii) | \(10^{-3}\) |
| (C) | milli | (iii) | \(10^{-12}\) |
| (D) | giga | (iv) | \(10^{-15}\) |
1. (A) →(i), (B)→(ii), (C) →(iii), (D)→ (iv)
2. (A) →(ii), (B)→(i), (C) →(iv), (D)→ (iii)
3. (A) →(iv), (B)→(iii), (C) →(i), (D)→ (ii)
4. (A) →(iii), (B)→(iv), (C) →(ii), (D)→ (i)
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One of the statements of Dalton's atomic theory is given below:
"Compounds are formed when atoms of different elements combine in a fixed ratio."
Which of the following laws is/are related to this statement?
1. Law of conservation of mass
2. Law of definite proportions
3. Law of reciprocal proportions
4. Avogadro's law
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The approximate hydrogen-to-oxygen ratio of 1:8 in water samples from seas, rivers, or lakes illustrates the law of:
| 1. | Multiple proportions | 2. | Definite proportion |
| 3. | Reciprocal proportions | 4. | None of the above |
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The correct statement among the following is:
1. 100. has four significant figures
2. \(1.00\times 10^2\) has four significant figures
3. 2.005 has four significant figures
4. 0.0025 has four significant figures
1. 100. has four significant figures
2. \(1.00\times 10^2\) has four significant figures
3. 2.005 has four significant figures
4. 0.0025 has four significant figures
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A jug contains 2L of milk. The volume of the milk in m3 is:
1. 2 × 10–3
2. 2 × 104
3. 2 × 102
4. 2 × 105
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| Assertion (A): | The number 0.200 has 3 significant figures, while 200 has only 1 significant figure. |
| Reason (R): | Zeros at the end of a number are considered significant only if they are to the right of the decimal point. |
| 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. | Both (A) and (R) are False. |
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