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
Subtopic:  Moles, Atoms & Electrons |
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

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
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

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
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

advertisementadvertisement

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
Subtopic:  Moles, Atoms & Electrons |
 51%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

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
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital