- 1(current)
Q. No.How many chlorine atoms are in 1.00 mL of CCl4 (M = 153.8, density = 1.59 g mL–1)?
1. 1.56 × 1021
2. 6.23 × 1021
3. 1.57 × 1022
4. 2.49 × 1022
1. 1.56 × 1021
2. 6.23 × 1021
3. 1.57 × 1022
4. 2.49 × 1022
Subtopic: Moles, Atoms & Electrons |
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If 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 the:
| 1. | definition of mass in units of grams. |
| 2. | mass of one mole of carbon. |
| 3. | coefficient of chemical species in a balanced equation. |
| 4. | ratio of elements in a compound. |
Subtopic: Moles, Atoms & Electrons |
73%
From NCERT
NEET - 2015
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The 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) |
Subtopic: Moles, Atoms & Electrons |
79%
From NCERT
NEET - 2020
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Which one of the following samples of gases contains the most particles?
All 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
All 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
Subtopic: Moles, Atoms & Electrons |
51%
From NCERT
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One mole of oxygen gas at STP is equal to:
| (a) | 6 .022× 1023 molecules of oxygen |
| (b) | 6.022 × 1023 atoms of oxygen |
| (c) | 16 g of oxygen molecule |
| (d) | 32 g of oxygen |
Choose the correct answer from the option given below:
1. (a) and (b)2. (a) and (c)
3. (a) and (d)
4. (c) and (d)
Subtopic: Moles, Atoms & Electrons |
72%
From NCERT
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- 1(current)
Q. No.
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