Question:
Number of atoms in the following samples of substances is largest in :
Number of atoms in the following samples of substances is largest in :
Updated On: Aug 8, 2024
- $4.0\, g$ of hydrogen
- $71.0\, g$ of chlorine
- $127.0\,g$ of iodine
- $48.0\, g$ of magnesium
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
$4g$ of hydrogen = 4 mole of hydrogen
$= 4 \times 6.023 \times 10^{23}$ atoms
$71.0$ gm of chlorine $\frac{71.0}{71.0}=1$ = moles of chlorine
$= 6.023 x 10^{23}$ atoms
$127$ gm of iodine $=\frac{1}{2}$ mole of $I_2$
$=\frac{127}{254}=6.023\times10^{23}\times\frac{1}{2}$ atoms
$48., gm$ of magnesium
$=\frac{48.0}{24.0}=2\times6.023\times10^{23}$ atoms
$\therefore 4.0\,gm\,H_2$ has largest number of atoms.
$= 4 \times 6.023 \times 10^{23}$ atoms
$71.0$ gm of chlorine $\frac{71.0}{71.0}=1$ = moles of chlorine
$= 6.023 x 10^{23}$ atoms
$127$ gm of iodine $=\frac{1}{2}$ mole of $I_2$
$=\frac{127}{254}=6.023\times10^{23}\times\frac{1}{2}$ atoms
$48., gm$ of magnesium
$=\frac{48.0}{24.0}=2\times6.023\times10^{23}$ atoms
$\therefore 4.0\,gm\,H_2$ has largest number of atoms.
Was this answer helpful?
4
0
Top Questions on Some basic concepts of chemistry
- A compound X contains 32% of A, 20% of B and remaining percentage of C. Then, the empirical formula of X is:
(Given atomic masses of A=64; B=40; C=32 u)- NEET (UG) - 2024
- Chemistry
- Some basic concepts of chemistry
- The technique used for purification of steam volatile water immiscible substance is:
- JEE Main - 2024
- Chemistry
- Some basic concepts of chemistry
- The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is -
- JEE Main - 2024
- Chemistry
- Some basic concepts of chemistry
- Following Kjeldahl's method, 1g of organic compound released ammonia that neutralized 10 mL of 2M H\(_2\)SO\(_4\). The percentage of nitrogen in the compound is _________.%.
- JEE Main - 2024
- Chemistry
- Some basic concepts of chemistry
- The energy associated with the first orbit of He+ is:
- KCET - 2024
- Chemistry
- Some basic concepts of chemistry
View More Questions
Questions Asked in JEE Main exam
- Let $ A = [a_{ij}] $ be a $3 \times 3 $ matrix such that: $$ A = \begin{bmatrix} 0 & 0 & 4 \\ 1 & 0 & 0 \\ 0 & 1 & 3 \\ \end{bmatrix}, A^{-1} = \begin{bmatrix} 0 & 1 & 0 \\ 1 & 3 & 0 \\ 2 & 1 & 0 \end{bmatrix}. $$ Then $ a_{23} $ equals:
- JEE Main - 2025
- Matrix Operations
For the reaction, $H_2(g) + I_2(g) \rightleftharpoons 2HI(g)$
Attainment of equilibrium is predicted correctly by:
- JEE Main - 2025
- Periodic properties
- In YDSE, light of intensity 4I and 9I passes through two slits respectively. The difference of maximum and minimum intensity of the interference pattern is:
- JEE Main - 2025
- Wave optics
Let $\left\lfloor t \right\rfloor$ be the greatest integer less than or equal to $t$. Then the least value of $p \in \mathbb{N}$ for which
\[ \lim_{x \to 0^+} \left( x \left\lfloor \frac{1}{x} \right\rfloor + \left\lfloor \frac{2}{x} \right\rfloor + \dots + \left\lfloor \frac{p}{x} \right\rfloor \right) - x^2 \left( \left\lfloor \frac{1}{x^2} \right\rfloor + \left\lfloor \frac{2}{x^2} \right\rfloor + \dots + \left\lfloor \frac{9^2}{x^2} \right\rfloor \right) \geq 1 \]
is equal to __________.
- JEE Main - 2025
- limits and derivatives
- Let $f: [0, 3] \to A$ be defined by $f(x) = 2x^3 - 15x^2 + 36x + 7$ and $g: [0, \infty) \to B$ be defined by $g(x) = \frac{x}{x^{2025} + 1}$. If both functions are onto and $S = \{ x \in \mathbb{Z} : x \in A \text{ or } x \in B \}$, then $n(S)$ is equal to:
- JEE Main - 2025
- Area of a Triangle - by Heron’s Formula
View More Questions
Concepts Used:
Some Basic Concepts of Chemistry
Chemistry is a vast subject and for understanding its significance we can take help of following points:
- Chemistry plays an important role in understanding various subjects like physics, geology and biology.
- Chemistry is a core branch of science that explains us about the various compositional properties and interaction of matter. It also helps to understand various chemical reactions.
- Chemistry is important in order to understand the behaviour of fertilizers, alkenes, acids, salts, dyes, polymers, drugs, soaps and alloys in organic and inorganic chemistry.
- Chemistry plays an important role in various fields like healthcare, industrial, research, food, and farm activities.
Read More: Some Basic Concepts of Chemistry
Classification of Matter
There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
- Solids - have definite volume and definite shape
- Liquids - have definite volume but not definite shape.
- Gases - have neither definite volume nor definite shape.
(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
- Pure Substances are defined as a single substance (or matter) which cannot be separated by simple physical methods. Pure substances can be further classified as (i) Elements (ii) Compounds
- Mixtures are the combination of two or more elements or compounds which are not chemically combined together and may also be present in any proportion.